What does the slash mean/do <\html>

Answer 1

slash is used to indicate closing tag.

Answer 2

HTML elements with no content are called empty elements. <br> is an empty element without a closing tag(the <br> tag defines a line break). Empty elements can be "closed" in the opening tag like this: <br />. HTML5 does not require empty elements to be closed.

Answer 3

in HTML, forward slash is used to close a tag
<b> Bold Text</b> and <b>Bold</b> Text are different