Question

what is declared empty tag​

Answer 1

Answer

An "empty tag" refers to HTML coding where the line of code stands alone and is not closed with slash characters. Empty tags are used to insert images, lists, breaks, meta tags, horizontal rules and hyperlinks.

Answer 2

Definition: An element with no content is said to be empty.] The representation of an empty element is either a start-tag immediately followed by an end-tag, or an empty-element tag. ... For interoperability, the empty-element tag SHOULD be used, and SHOULD only be used, for elements which are declared EMPTY.