What a meta robots tag mean?

The meta robots are HTML tags inserted in between the code on pages and instructed the search engine to specify the page content.

An example, instruct the search engines to do not index that page. It can be used to index or not index pages, images, and follow-nofollow links on a page

Note: Do not confuse this NOFOLLOW with the rel=”nofollow” link attribute.
“Nofollow” in the head section will no follow all links on the page.

What’s the way to check my site’s meta robots tags?