Search Engines uses a complex mathematical algorithm to rank web pages. This algorithm takes into consideration various signals from a variety of sources for accurate ranking of web pages with respect to the search queries entered by the user. Major search engines like Google, Yahoo, Bing, Baidu, Excite, Ask, Yandex etc maintain a huge database for the storage of billions of web pages which are crawled by their bots every day. It is because of this combination of database and algorithms that we are able to find information easily on the web. Search engines make use of specialized data centers and larger memories to process large chunks of data and display the search results within seconds.
How the search engines work
Search Engine bots (spiders) crawl the web for hyperlinks on a web page. The links crawled are saved in a large data base which may be divided into specific data centers according to the geographic localization. In this way, search engines continue this process of crawling and indexing of data.
The large portion of data stored in the database is processed using high quality processors. These processors are proficient enough to process billions of web pages and fetch out exact data as per the search query entered by the user.
When a user enters a specific search query, the search engine matches it with the available web pages in its database. This searching is done within fraction of a second with the help of latest processors. Searching of the data is done on the basis of an algorithm which is a top secret.
After the data is processed, the search engines return links to web pages which are closely related to the user’s query.