search engine optimization meta tags?
 

which are the import?

Meta tags are on - page SEO factor. Meta Title Tag and Meta Description Tag both are very important to get high SERP.

Meta Tags are the 1 important factor of SEO.

A meta tag is a tag (that is, a coding statement) in the Hypertext Markup Language (HTML) that describes some aspect of the contents of a Web page. There are many meta tags and html-tags and obviously they don't all influence the search result.

both the things are equally important.

Title Tag - This is the text you'll see at the top of your browser. Search engines view this text as the "title" of your page. Meta Description Attribute - A brief description of the page. Meta Robots Attribute - An indication to search engine crawlers (robots or "bots") as to what they should do with the page.