Introduction to search engine

How does a search engine work?

Basically, the search engines (search engines, SE) are huge databases containing information on the content of websites that integrate the web.
The most popular search engine, Google, contains more than 3,000,000,000 websites . When you enter a phrase or word, the engine will search its database and return results in an order that is determined by its own algorithm.

So, how do they get to start all this information?

Spiders (spiders)

Search engines use spiders used to collect information from web sites . Spiders crawl the websites to collect data and follow the links on the pages. The spiders crawl the Internet almost continuously collecting new and updated pages of the Web to keep their results a day.

Data Processing

The data extracted spiders are treated differently by the various search engines. Search engines put the 'weight' in different parts of a website and how it fits into the Web . In this way determine the order in which web sites should appear in search results (the pages that contain the search results are commonly called SERPs - search engine result pages).


Most search engines update their databases at least once a month with information gathered by their spiders. This is important to know when you have a website relatively new - if you put your website for the first time in the network at the end of a 'screen' and the spiders will not find it, you'll have to wait until the next update to joining of the database. Once the web site goes into the database will still take one or two more updates before the new Web site is stabilized in the search results.


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