Typing on page search engine or search box (top of screen) browser events start to happen that are hidden from ordinary users.How, then, in the vast World Wide Web to find information, and what is the relevance of search results?The word comes from the Latin «relevo» and translated into Russian as "raise" or "facilitate".The English equivalent of the term - «relevance».In paragraph 3.5.1 of GOST 7.73-96 stands for this concept, and "relevant" and "relevant" have the same definition that is made according to the information received by the user information request.
This national standard contains other useful standardized terminology and definitions relating to the field of information retrieval and dissemination of information via automated systems.The document helps to understand the meaning of many words in the information, publishing and library activity, and not just a unit of language, as "relevant".The definition of "pertinence" and "pertinence" and decrypted paragraph 3.5.2 GOST 7.73-96.They should be treated as correspondence received information data information needs.This is often confused with the concept of relevance that is fundamentally not true, because in one case it is a question of compliance with the request, and the other - according to the needs.It is also wrong on the question: "What is the relevance?" Answer that the term is close to the concept of "value" that is, the practical applicability of the results.
But all the same there is information?The search engine uses an army of bots - stand-alone programs, visiting websites and store information about them.The name is derived from the English word «bot», that is short for «robot».These programs are finding new sites and then go to the home page and browse its contents.Bots are studying pages linked to the home (in a browser it is loaded first) internal links.Also, the program-bots look at the links that point to other sites that have external links.Save this information, pass on them, discovering new sites and learn how web resources are linked.Thus, they are constantly studying the "map" of the World Wide Web.But what is the relevance?What does it have to do with the bots?
In a specific example, see that offer search engines Yandex and Google.On the question "What is the relevance?" Extradition Yandex found 28 million responses, and at Google 155 thousand.It can be said that they all meet demand and needs are not always, that is, pertinence are not all of them.For example, the page in Wikipedia CEO explains this concept will undoubtedly be useful, and the site of the relevant and irrelevant costs in decision-making does not apply to this topic.A more obvious example is when a request "hands up", meant to receive information about the musical group, Yandex has issued 31 million responses, and among them there is an article with an appeal to raise his hands up, as it is, according to the therapists, very helpful.Such a response can not be considered pertinence, although the responses of the 31 million he took in issuing 586 position.
Thus, the higher the relevance of the text, the more likely that it will go down in the first positions of search responses.This index is a quantitative assessment, but its implementation algorithms of various search engines have different and unknown to the user, and they change with time, as the search engines are trying to climb in the rankings, try to provide the pertinence information, reducing the time to search for it.Deemed highly relevant page keyword entry matching the query may be in the range of from 3 to 7%.But this is not the only criterion of the relevance of the document.These include a number of internal and external parameters.Internal indicators (except for keyword density), is their position in the text (entering the title, their closeness to the title and to each other to form a possible search phrases), as well as the presence of synonyms, confirming that the content of the text search.The main external indicator is considered to be popular in the global network, which indicate PageRank to Google, Yandex and TIC have Tor100 the system Rambler.That is, how often the page go to other sites, it is better if they are highly rated.That's what relevance.
