Meta tags are very useful for SEO . By using these tags a website can be powerful for seo. It can gives & makes rank 1 for the website !
EXAMPLE OF META TAGS
meta name revisit-after Ask me that meta name="revisit-after" is good?
If u use it,the google bot will re-crowl your site.so, i will suggest you to use it.
Example
Meta name Keywords( 2 ) Meta name keyword tag is a kind of meta tags thats are shown in the google search. It can makes a site powerful .
It should keep in the tags.
The code example: