The system search engines use to rank search results. Relevancy is based on a mathematically calculated formula known only by the search engine, the formula is also known as algorithm, over 70 factors can be included in the algorithm.
How Search engines determine any given page's ranking from searches. Relevancy is based on mathematical formulas called algorithms. These Algorithms take several factors into account to consider a site relevant including: keyword density, link popularity, amount of content and relevance of content as it relates to the searched word or phrase.
How well a web page or other indexable document provides information for which a searcher is looking, as measured by the searcher. Generally, the higher the relevance, the higher the RANKING, although this does not have to be the case.
The measure of the accuracy of the search results - in other words it's a measure of how close the documents listed in the search results are to what the user was looking for. The ability to return relevant results is a big thing in the search engine world - and arguably the one thing that made Google stand out of the crowd and gain much popularity in a short time. Also see precision and recall .
The degree to which the content on a web page that is returned in a list of search results (SERPS) "matches" the topic of the information that the user was searching for. In other words, if you use the search phrase "small green widgets" and a page is returned that deals with "large red thingamajigs", the relevancy of that page is very poor.
The pertinence of the charge to the law. Thus, there could be a challenge to the relevancy where the charge, if proved, would not constitute an crime known to the law of Scotland. The pertinence of evidence to the facts in issue. Thus, there could be a challenge to the relevancy of testimony which was unrelated to the facts in issue