Why Google My Business is really important
If you don't get involved, Google may well just create a panel anyway
Yoast
New longer descriptions in Google: should we do anything?
Do they make a difference to ranking or click-through rate, and should we rewrite all of our descriptions?
So what makes a good link?
The answer is, of course, one from a page or site which is relevant to the search term you're trying to rank for.