Search engines are often called spiders or crawlers. They display relevant content to users inresponse to queries submitted as keywords. However, since search engines are computer programs that are less complex than the human brain, they have limitations.

By scanning through the keywords on a page, they usually rank websites based on keyword density. They are sophisticated enough to recognize and identify spam and keyword abuse.

As a rule, search engines love to see a lot of content on all pages, hence large sites are more favored by them.

The second favorite of search engines is the number of links the site would have pointing in and out.

Apart from that, search engine engines also look at the page Title tag and META tags, style formatting, and a few other things.

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