Some new tags that were introduced in HTML5 are header, footer,
main, aside, canvas, svg, source, audio, and video. The canvas and
svg are most notably used for creating online applications and
games, something that was only possible before with flash.
There are much, much more possibilities of HTML5, and it is not
possible to list them all here.
Here is a good resource, however:
w3schools.com/html/html5_new_elements.asp