search engines

In last tutorial we learn about what is seo. Today we are going to learn how search engine works

       How search engines work

When talking about search engines it's vital important that search engines are not humans however text-driven computers, they do not care concerning how your website appearance but what is written on that. when talking concerning the search engine process there's a   distinction in the crawl, index, and retriev process.

1)Crawling process

A website is crawled by software known as a spider, crawler or in the case of Google a Google bot. this implies the crawler will cross-check the text on {a website|an internet site|a web site} and appears for links to completely different pages from that website. The spider will begin from URLs found on previous indexed pages but the spider will crawl webpages more then once before they gets indexed.

A web crawler doesn't daily visit each page as this would be unnecessary once some pages almost never change, rather would the crawler visit pages with frequent changes.

2)Indexing process

The content on the page is analyzed to determine how it should be indexed. The crawler look for rummage around for the page title, headings and meta tags and other info to be keep in index databases, the remainder of the content are keep in different databases. the main purpose of compartmentalisation is to spot an internet site and assign keywords that best describe the web site. this is wherever SEO comes, you need the search engine to assign the page to the proper keywords.

3)Retrieving process

When a search engine user looks for keywords their search strings are matched to the index info and also the search engine can return a list of best-matching pages with a brief description. possible million if not billion pages are matched to the search string and therefor does the search engine need to calculate that pages are the most relevant.

Each search engine has his own algorithmic program to define which page is more relevant and deserves a higher rank in the search result. These algorithmic program are closely kept secret from the general public else everybody would be ranked number one and also the algorithmic program would haven't any use. There are some general rules that are well-known under webmasters that improves a website’s ranking. this is where SEO applies after you concentrate on these rules while making or improving your to remember.