A review of Google filters over the past 7 years

For most of us Google is an indispensable tool in everyday life, and for many businesses and internet marketing professionals it is the arena where the real fight for survival takes place.

What makes Google so effective at delivering relevant results? The answer lies in the refinement of its algorithms. Over the past seven years the company has rolled out a series of significant updates that have radically changed the world of search engine optimisation (SEO).

In this article we will take a detailed look at Google's key algorithms — Panda, Penguin, Pirate, Hummingbird, Pigeon, Mobile Friendly, RankBrain, Possum and Fred. Each of these algorithms has unique features and goals, and understanding how they work will help you not only optimise your site but also understand how Google «thinks».

Table of contents:

• What is a Google filter?
• The Panda algorithm
• Example
• The Penguin algorithm
• Example
• The Pirate algorithm
• Example
• The Hummingbird algorithm
• Example
• The Pigeon algorithm
• Example
• The Mobile friendly algorithm
• Example
• The RankBrain algorithm
• Example
• The Possum algorithm
• Example
• The Fred algorithm
• Example

What is a Google filter?

In the world of search engines Google occupies a dominant position, and one of the reasons for this is its refined algorithms, able to supply users with the most relevant and useful information. But what exactly allows Google to «select» content so precisely? The answer lies in specialised filters that exclude low-quality, duplicated or otherwise undesirable web pages from the results.

Filters are sets of rules and parameters applied to search results with the aim of improving the quality of what is shown. They analyse various aspects of websites: from the quality and uniqueness of the content to how well it matches user queries and whether it offers features that are useful to visitors.

Let us say you have a Turkish real estate agency specialising in selling apartments to foreigners. If your site has high-quality, unique content, is properly optimised for key queries (for example, «buy apartments in Turkey») and provides useful information for potential buyers, Google's filters will be «your friends». They will raise your site in the search results, bringing more attention to your business.

However, if your site duplicates content or uses dishonest promotion methods (for example, «black hat SEO»), Google's filters will immediately lower it in the rankings or even exclude it from the results entirely.

Why does this matter?

Understanding how filters work is not just interesting but critically important for success in internet marketing. The effective use of SEO strategies depends directly on the ability to «pass through» these filters by optimising your content so that it meets every requirement of quality and relevance.

The Panda algorithm

Everyone knows that Google never stops refining its search technologies. One of the key steps along this path was the introduction of the Panda algorithm, launched in 2011. The goal of this algorithm is to improve the quality of search results by removing or demoting low-quality, unoriginal and uninformative websites.

The essence of the algorithm is the assessment of web page content. Panda analyses various characteristics such as the originality of the text, its usefulness and relevance, and the level of expertise of the authors.

Example

Let us look at how Panda can affect a Turkish real estate agency specialising in selling apartments to foreigners. If your site contains unique and useful articles about the process of buying property in Turkey, the legal aspects, taxes and so on, Panda will «approve» your resource, improving its positions in the search results.

However, if most of the content on your site is a copy of information from other resources or does not provide any specific benefit to potential buyers, the algorithm will lower your site in the rankings or even remove it from the index.

Recommendations:

• Create original and useful content that solves the specific tasks of your audience.
• Avoid «thin» content: articles with very little text that do not answer users' key questions.
• Work with real estate experts to create authoritative material.

The Panda algorithm is not just a «filter», it is a whole system for assessing the quality of web resources. Understanding how it works and the principles behind it will help you make your site not only «friendly» to search engines but also useful to your potential clients. Whether you become a leader in your niche or remain on the periphery of buyers' interests depends on your attitude to creating content.

The Penguin algorithm

When it comes to search engine optimisation, one of the most influential Google algorithms is Penguin. Introduced in 2012, this algorithm is aimed at fighting manipulation of search rankings, especially through poor-quality or artificial backlinks.

Penguin scans a website's backlink profile to identify unnatural, manipulated or low-quality links that violate Google's guidelines. On the basis of this analysis the algorithm can either raise or lower the site's positions in the search results.

Example

For a Turkish real estate agency specialising in apartments for foreigners, understanding how the Penguin algorithm works is critically important. Suppose you decide to use paid or artificial links to improve your site's positions. In that case Penguin will «notice» this and will most likely lower the ranking of your resource.

Conversely, if your backlinks come from authoritative resources in the real estate or tourism field and are the result of a natural process (for example, bloggers linking to your useful material), your site will get «points» from Penguin, which will have a positive effect on its ranking.

Recommendations:

• Analyse your site's backlink profile and remove or correct poor-quality links.
• Focus on earning natural links through quality, useful content.
• Avoid using «black hat» SEO methods such as buying links or generating them automatically.

The Penguin algorithm is a powerful tool in Google's hands for ensuring quality and trust in search results. To work with it successfully it is important to build your promotion strategy on honest, high-quality methods. Such an approach will not only strengthen your position in the search results but will also make your brand more attractive to potential clients.

The Pirate algorithm

Among Google's tools for fighting poor-quality content and violations there is also the Pirate algorithm. Launched in 2012, this algorithm is aimed at combating copyright infringement. Its main focus is identifying and penalising sites that provide illegal content or infringe intellectual property.

Pirate operates on copyright infringement signals that come from content owners and other sources. On the basis of this data the algorithm reduces the visibility of the offending resources in the search results or removes them from the index entirely.

Example

For a Turkish real estate agency specialising in selling apartments to foreigners, the Pirate algorithm can matter if copyrighted photographs, texts or other materials are used without permission. Suppose you took photographs of apartment interiors from another site and posted them on your own without having the right to do so. In this situation, after a complaint from the content owner, the algorithm will lower your site's ranking or even remove it from the index.

Recommendations:

• Use only original, unique materials.
• If you do need to use someone else's content, make sure you have permission for it.
• Clearly state the authorship and the sources of all the materials you use, if the licence requires it.

The Pirate algorithm, although not discussed as often as Panda or Penguin, plays an important role in maintaining the quality and legality of content on the web. For real estate businesses this means that intellectual property rules must be strictly observed in order to keep and improve their positions in Google. Taking these aspects into account will help you not only avoid penalties but also build trust among potential clients.

The Hummingbird algorithm

If we think of Google's algorithms as tools in a surgeon's hands, then Hummingbird is not a scalpel but a laser. Introduced in 2013, this algorithm does not merely filter or rank web pages; it revolutionises the very foundation of the search engine, letting Google better understand the user's intent.

Hummingbird focuses on understanding the meaning of queries rather than simply individual keywords. This allows the algorithm to deliver more accurate results even when the query is phrased in a complex or unusual way.

Example

For a Turkish agency selling apartments to foreign citizens, Hummingbird offers interesting opportunities. Consider a hypothetical example: a user enters the query «What documents are needed to buy a flat in Antalya for foreign citizens?». Older algorithms might have focused on keywords such as «documents», «purchase», «flat», «Antalya» and «foreign citizens». Hummingbird, however, seeks to understand the intent behind the query.

If your site has a detailed article answering this specific question, Hummingbird will improve the visibility of your page in the search results. This is an excellent opportunity to create deep, informative content that solves the specific problems of your target audience.

Recommendations:

• Create content that answers specific questions and solves your audience's problems.
• Use natural language and semantic key phrases that better reflect users' intentions.
• Avoid over-optimising the text; focus on creating useful, informative material.

Hummingbird is not just an algorithm but a whole new approach to processing search queries. In the era of voice search and the semantic web, understanding this algorithm becomes the key to building an effective SEO strategy. In this way you not only increase your chances of ranking highly but also provide real value to your potential clients.

The Pigeon algorithm

In search engine optimisation the Pigeon algorithm occupies a special place. Introduced in 2014, this algorithm focuses on local search, improving the accuracy and relevance of results based on the user's geographical location.

Pigeon uses many factors to determine the relevance of websites in the context of local search. These factors include the location of the business, the presence of customer reviews and even information on your site connected with specific locations.

Example

Let us look at how Pigeon can affect a Turkish real estate agency. Suppose your agency is located in Istanbul but you offer apartments all over Turkey. If your site has separate pages for each city or district where you offer property, the Pigeon algorithm takes this into account when forming local search results.

So a foreigner searching for «apartments in Antalya» will see your page higher in the results if it is well optimised and contains specific information about that geographical region.

Recommendations:

• Create separate pages for each geographical region in which your business provides services.
• Enrich these pages with quality content, including photographs, reviews and other useful information.
• Make sure your business is registered in Google My Business and other local directories with an accurate address and contact details.

The Pigeon algorithm significantly affects local search, making it more accurate and relevant for users. For businesses, including Turkish real estate agencies, this is an excellent opportunity to attract both local and foreign audiences. Understanding and skilfully using this algorithm can be the key to your success in the incredibly competitive field of online real estate.

The Mobile friendly algorithm

In an era when smartphones have become an inseparable part of our lives, search engines could not stand aside. In 2015 Google introduced the Mobile-friendly algorithm, whose goal is to make mobile search convenient and effective.

The Mobile-friendly algorithm assesses how well a site is adapted for viewing on mobile devices. This includes the readability of the text, the convenience of navigation and page loading times. Sites that meet these criteria receive «bonuses» in the form of higher rankings in mobile results.

Example

Imagine that your Turkish real estate agency already has an excellent website with quality content. However, if that site is not optimised for mobile devices, you risk losing a significant part of your audience.

Suppose a foreign client is looking for apartments in Turkey using a smartphone. If your site is not adapted for mobile devices, they may run into problems viewing photographs, reading descriptions and even trying to contact you. As a result, a potential client may move on to competitors whose sites offer a more comfortable user experience.

Recommendations:

• Test your site for mobile adaptability using Google's tools.
• Optimise the design, speed up loading times and simplify navigation for mobile users.
• Do not forget meta tags and structured data, which also affect mobile rankings.

The Mobile-friendly algorithm is not just a demand of the times but a necessity for any business that wants to stay competitive in the digital age. This is especially relevant for Turkish real estate agencies trying to attract foreign buyers. Mobile optimisation of your site will make the process of searching for and buying property far simpler and more pleasant, which in turn will have a positive effect on your reputation and your sales.

The RankBrain algorithm

In the broad palette of Google algorithms RankBrain occupies a special place. Introduced in 2015, this algorithm uses machine learning to understand the meaning and context of search queries, which increases the accuracy and relevance of the results.

RankBrain is able to analyse queries that use rare or complex words and phrases. The essence of its work lies in understanding the user at a level unattainable for most other algorithms. This tool «learns» from the data of previous search queries, which lets it predict which pages will be most useful for a specific query.

Example

Imagine the situation: your Turkish agency specialises in selling apartments to foreigners. Someone from Germany enters the query «Wohnung kaufen in der Türkei als deutscher Staatsbürger» (How can a German citizen buy a flat in Turkey?). RankBrain takes into account that the query was made in German and is aimed at buying property in Turkey. If your site contains detailed information on this topic and it is optimised not only for the Russian-speaking but also for the German-speaking audience, the likelihood of your resource ranking highly increases significantly.

Recommendations:

• Create content that answers the specific, even complex, questions of your audience.
• Use a semantic core and key phrases that may be of interest to your international audience.
• Organise your content so that it is useful and understandable to people regardless of their geographical or linguistic context.

RankBrain is one of the most advanced algorithms in Google's arsenal. For businesses, including Turkish real estate agencies, this means that a deep understanding of the needs and questions of their audience is essential. Only then can you create content that is not merely relevant but genuinely useful to users — which in turn RankBrain will reward by improving your site's positions in the search results.

The Possum algorithm

In the context of local SEO one cannot fail to mention the Possum algorithm, introduced in 2016. This algorithm significantly affected local search, refining and broadening the geographical parameters used to rank web pages.

Possum places the emphasis on the proximity of the user's location to the place discussed on the web page. Whereas previously only the presence of geographical markers mattered, the system now analyses them down to the street or even the building.

Example

Let us look at how this algorithm can affect a Turkish real estate agency. Suppose your agency is located in Istanbul and specialises in selling apartments in that city to foreign clients. If a potential buyer from France searches for «apartments in Istanbul near Taksim Square» and your site contains detailed information about property in that specific district, Possum will increase the chances of your page appearing in the results.

Recommendations:

• Publish detailed descriptions on your site of the districts where the property you offer is located, giving exact addresses and nearby landmarks.
• Use markup schemas to indicate the location of properties precisely.
• Register your business in Google My Business and other local directories, giving exact geographical coordinates.

The Possum algorithm added a new level of complexity to local SEO, but it also opened up new opportunities for businesses. For Turkish real estate agencies this means that it is no longer enough simply to state which city or district a property is in — you must give the most precise geographical data possible. Such an approach will not only improve your site's ranking but will also give potential clients all the information they need to make a purchase decision.

The Fred algorithm

Among Google's many algorithms, Fred deserves special attention. Introduced in 2017, this algorithm has a particular focus on content quality and on fighting sites created purely for monetisation.

The central element of the algorithm is the filtering of low-quality content that provides no real value to the user but actively uses various monetisation methods. This includes sites with excessive advertising and irrelevant or superficial content.

Example

For a Turkish real estate agency specialising in selling apartments to foreigners, Fred becomes critically important. If your site is overloaded with advertising banners and contains a minimum of useful information for buyers, you risk lowering your ranking in the search results.

For example, if a page describing apartments in Antalya devotes more attention to advertising blocks than to detailed information about the property, the Fred algorithm may reduce the visibility of your site in the search results.

Recommendations:

• Focus on creating quality content that represents real value for your audience.
• Limit the number of advertising elements on your site, especially on key pages.
• Publish detailed property descriptions, high-resolution photographs and other materials that will help a potential buyer make an informed choice.

The Fred algorithm is a clear example of how Google tries to make the internet better and more useful for users. For Turkish real estate agencies this means that a careful approach to creating and monetising content is essential. Only in this way can you secure a high ranking for your site and attract foreign buyers who are looking for reliable and transparent conditions for investing in Turkish property.

Awareness of these algorithms and their functions can become your advantage in a tough competitive fight. Understanding how each algorithm works lets you build an effective SEO strategy that will not only improve the visibility of your site in search engines but also make it more useful and attractive to your target audience.