The acronym "HNQ" has been mentioned a lot recently. Regarding Hot Network Questions (HNQ), there was a question on Meta Stack Exchange: What is the Goal of "Hot Network Questions"?
In the context of questions in mathematics, I think the goal may be different. Hence my question:
What is the goal of having questions from Mathematics Stack Exchange in the SE Network Hot Questions List?
See also a related question on meta several years ago (thanks to @Martin Sleziak):
What are advantages/disadvantages of having question in hot questions list?