<p>I frequently see questions that to which I do not know the answer but that I would like to know how to answer. On many websites there is a follow button next to where the "share", "edit", and "flag" buttons appear. There are other ways of doing this, as I am sure others will point out, but I think this button would see a lot of use.</p>

<p>edit - here is an example of a professional forum having such a button: <a href="https://www.biostars.org" rel="nofollow noreferrer">https://www.biostars.org</a></p>

<p>edit 2 - as other users have indicated the ability to favorite a question is substantively different than the ability to follow a question.</p>
