Introduction to the ranking of Google search results

Amit Singhal (Amit Singhal), team leader Google ranking.

About the Group search quality you learned from. post Udi Manber.
We usually call this group simply ' quality ' (Quality). It includes the basic functionality of the team ranking (Core Ranking), a team of international search (International Search), click UI (User Interfaces), a team of quality control (Evaluation), a team against Internet spam (Webspam) and other. In this post I want to tell you of the basic functionality of the team rankings.

First a few words about yourself. My name is Amit Singhal. I manage a group of ranking in Google's. In the area of ​​search technology I'm working now for eighteen years. I first became acquainted with the search in 1990. When he wrote a diploma in computer science. In the search for an academic environment is called ... Having worked in the field of fundamental research IR- 10, in 2000 I took a job at Google. Since then I have been doing technology ranking of Google search results.

Ranking in Google - a set of algorithms that find exactly those documents that best meet the user's query. We process hundreds of millions of queries a day, referring to a database consisting of several billion pages. Our algorithms are used in almost every Google search service in relation to any queries entered by users. While searching the Internet - is the most widely used and best known search engine Google, the same ranking algorithms are used in various modifications, and other services - Pictures, News, YouTube, Maps, search products, search for books and other.

The most frequent question I get asked about the rankings, ... Of course, creating such an advanced and modern ranking system like ours, involves many different aspects of. For example, the technological issues of ranking, I would like to discuss the details in the next post. And today I want to tell you about the principles on which the rankings in Google. In short, these principles can be described in three phrases:.

1) The best quality of search results, taking into account local conditions anywhere in the world.

2) Everything must be clear and simple.

3) No manual changes.

The first principle is obvious. With our passion for the development of the search, we are doing everything possible to your request for each user gets exactly the results that he needs. We often say that no inquiry is left unattended. If the query result was imperfect (because the task of finding, strictly speaking, has not been solved until the end ), regardless of the language and country of origin of the request, each such case is a source of inspiration for further development of technologies.

The second principle is also quite obvious. Is not every system architect strives to be the system remained as simple as possible? . We try very hard to make our system remains simple without compromising the quality of search results. This task is extremely important, and not for a moment it must not be forgotten. Every week we produce about 10 changes in the ranking algorithms, and at the start of each change, we pay great attention to ease of. Our developers know exactly why a particular page is located on this site in search results. Having a simple system that is easy to understand, allows us to rapidly innovate. This means that the principle of simplicity, we done a very good service.

None of the discussions of mechanisms Google ranking goes by without a standard - but based on prejudice! . This question is answered our third core principle: any changes manually! . Internet access is created by people. You - the people who create pages and link them to other pages. And we use it all the wealth created by human hands in our algorithms. When we finally regulate the algorithms for query results, they use the results of the entire Internet community, and not the opinions of individual staff by Google. We believe that the subjective judgment of any man... are subjective, and the information that our algorithms have learned from the enormous diversity of human knowledge, a prisoner in your web pages and links, better than any human subjectivity.

There is another reason why we are fundamentally against the manual adjustment of the search results. If the query is wrong - this is another reason for us to improve the ranking algorithm. Refinement of the search algorithm is not only improves the results of a particular request, it leads to better quality at once for an entire class of queries, often in all languages. In all of this I must add that there is a clearly -written. policy. Determining what requirements must meet the recommended Google Sites. We are taking action against those sites that violate our policies, legal requirements, distribute child pornography, viruses, malware, etc. Dr..

I would be happy if you're familiar with my next post, which I 'll detail what technologies are used to rank. A number of examples you can see how the different methods of organizing the search results. To conclude this post I would like to add that our passion for the development of search methods is stronger than ever. And that means that I, as a researcher in the field of information retrieval, is the best job on earth:-).
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