The <aside> element represents an aside to the text, such as a sidebar. Basically <aside> Tag is used in sidebar of a page, whenever user clicks on the index, it redirects the user on the related content.
There are some attributes of <aside> element:-
Accesskey
Class
Contenteditable
Contextmenu
Dir
Draggable
Hidden
Id
Lang
Spellcheck
Style
Tabindex
title