I'm bit confused about meta tags,meta description?

[mex]

I get confused about meta tags and meta descriptions--though i ve a slight idea of what they are but not convincing.Can someone please enlighten me ?

 

[marvinsam]

Meta Tag and Meta description are crawled by Google bot so its play an important role in ranking of your website

 

[shashant]

Meta tags are tags placed within the head section of your code that help define the contents of a web page.