Meta tags
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Meta-tags are a simple bit of website code and associated variables that the visitor to the web page cannot see (without viewing the code) but that web crawlers can see. Remember that the crawler can only read text, it doesn’t know how beautiful your site is. To see if a web page has meta-tags, you can view the source code for the page. Choose View – Source from the Internet Explorer menu.

The source code of some page should contain all of these:
HTML
HEAD
TITLE: Name of a site - title
META NAME="description" CONTENT="Short description of site"
link rel='SHORTCUT ICON' href='web place where you can find path for your shortcut icon - often in root'
META NAME="keywords" CONTENT="all important keywords that web page contains"
Once considered the silver bullet for search engine placement, the importance of meta-tags has been greatly reduced or even been eliminated from the relevancy formulas of most search engines.

The description meta-tag is designed to be used as the description for your search results. However, most search services also use other methods to build search result descriptions. Let’s use an activity to show how search services build search result descriptions.
Google and many other services use a text extraction method of building a description, showing the parts of sentences on the page that contain the keywords you are searching for. Also important is to said that Google search engine ignores meta tags keywords.
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