: All search engines consist of three parts: a database of webpages, a spider operating on that database, and a series of search engine software that decide how search results are displayed.

@Turnbaugh106

All search engines consist of three parts: a database of webpages, a spider operating on that database, and a series of search engine software that decide how search results are displayed.

First, a spider visits a webpage, reads it and then follows the links to other pages within the website. All the data that the spider has gathered is stored in the database, which contains a copy of every webpage that the spider has found. The spider will often return regularly to a website to look for any changes and update the database accordingly.

The search engine sotware sifts through the millions of webpages stored in the database, identifying the body text, links and other content on the page. It does this so it can find matches to a search and ranks them in order of their relevancy. Page titles, meta-descriptions and other various elements play a part in determining where a website should be ranked.

One advantage of having spiders revisit your site is that you can make changes to your webpage in order to appear higher in their relevancy rankings, then see if your changes worked. This is what search engine optimization is all about.

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