What is Meta Tag?

In seo, what is meta tag? Can anyone explain me?

Wel... meta-tags are header tags for providing meta-data of the web page. These are important because search engines trust some of this information when crawling and "storing" the web. Which and how search engines use this information variates from one to another. Some of this meta-tags are:

<META NAME="author" CONTENT="">
<META NAME="subject" CONTENT="">
<META NAME="Description" CONTENT="">
<META NAME="Classification" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Geography" CONTENT="">
<META NAME="Language" CONTENT="">
<META HTTP-EQUIV="Expires" CONTENT="">
<META NAME="Revisit-After" CONTENT="">
<META NAME="distribution" CONTENT="Global">
<META NAME="Robots" CONTENT="INDEX,FOLLOW">
<META NAME="country" CONTENT="">

Hope it helps.

Thanks for you information.....If we won't put the metatag in the site, then the can site easily cache in major search engines

meta tag is show in search engine result and spider is collect data from meta tag

This link contains many useful articles on meta tags: http://lmgtfy.com/?q=what+are+meta+tags

Meta tags are HTML codes used by search engines for indexing a website. They are really helpful but need to be used with caution.
Meta tags practically describe the content of a webpage.

Well meta tags will be always helpful to get the best advantage for your website as there are multiple reason where you have to work with the technique which helps to gain your complete benefit from it.
-----------------------------------------------------------------------
<META NAME="author" CONTENT="">
<META NAME="subject" CONTENT="">
<META NAME="Description" CONTENT="">
<META NAME="Classification" CONTENT="">
<META NAME="Keywords" CONTENT="">
<META NAME="Geography" CONTENT="">
<META NAME="Language" CONTENT="">
<META HTTP-EQUIV="Expires" CONTENT="">
<META NAME="Revisit-After" CONTENT="">
<META NAME="distribution" CONTENT="Global">
<META NAME="Robots" CONTENT="INDEX,FOLLOW">
<META NAME="country" CONTENT="">
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All the command which help you to get your website to best of the position if optimized properly as per SEO.

Google is ignoring Meta keywords in its search results while they are still important for Yahoo and Bing.Meta title and meta description are the important ones.

check this article out from searchenginejournal to what is the importance of meta tags....http://www.searchenginejournal.com/t...g-in-seo/6014/

Originally Posted by marknel Google is ignoring Meta keywords in its search results while they are still important for Yahoo and Bing.Meta title and meta description are the important ones.

You sure about this?

I know google does not give much emphasis for on-page optimization as other SEs but I think they still do value meta keywords.