Why is <meta>tag is used and what are it's feature?

Answer 1

Metadata is data (information) about data.

The <meta> tag provides metadata about the HTML document. Metadata will not be displayed on the page, but will be machine parsable.

Meta elements are typically used to specify page description, keywords, author of the document, last modified, and other metadata.

You can have a look on www.w3schools.com to see what a tag does and test it out.

Answer 2

view more information about meta tag
https://www.w3schools.com/tags/tag_meta.asp