Meta-tags are HTML (HyperText Markup Language) tags attached to a website which, through keywords, are used to carry information that can be read by browsers and other programs.
Description meta-tags are those which describe the specific web page to search engines using keywords. Google for example, uses meta-tags to read and index the text in the tag.
Meta-tags are especially useful in helping users and Google identify a specific page within your website, especially in searches that could bring up multiple pages.
