The Meta Description Tag

A Meta description tag needs to be kept brief and informative. A description of about 25-30 words will be fine. Keywords and key phrases should be included in the Meta description tag.
The one that says "name=description" is called as the meta description tag, The meta description tag allows you to influence the description of your page in the crawlers that support the tag, The text you want to be shown as your description goes between the quotation marks after the "content=" portion of the tag (generally, 200 to 250 characters may be indexed, though only a smaller portion of this amount may be displayed). An easy way to write meta description tag is to take the first sentence or two of body copy from your web page and use that for the meta description content