<p>I didn't really find  <a href="https://meta.stackexchange.com/questions/168035/display-tag-excerpt-tooltips-when-editing-a-question">this thread on SO</a> useful. Maybe the feature has been discontinued and/or because the thread is outdated (2014).</p>

<p>However, I have found a temporary solution, which might help address the problem for the time being. As @amoeba has mentioned, this is a very common problem, and displaying tag excerpts would really help people while editing questions, for tagging and untagging relevant tags.</p>

<p>Upon clicking on a particular tag, it gets flattened and then the excerpt gets displayed, as shown in the screenshot below (&lt;-- which have been captured today 02 Sept. '15)
<a href="https://i.stack.imgur.com/MTQ9v.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/MTQ9v.png" alt="Screen Shot"></a></p>
