I don't always do this with my blog posts but it is a useful trick for attracting attention to a blog post. People are curious and if they see an unanswered question for a topic that interests them, there is a higher chance that they will click on the link to find out more.
Don't believe me? Use my go-to default realty check: how would you respond if you saw these two articles:
Giant Shark Found on the Beach
Giant Shark Found on the Beach, Researchers Puzzled
Ok, so yeah, maybe you'd click on the first title. But all the information is already given to you in the title. So the only reason why you'd want to read further is to find out which beach or maybe a picture of the shark. Very little is left to the imagination.
The second title is more open-ended. Researchers puzzled? What the heck? Puzzled over what? So now you have more motivation to read that article because you not only want to know which beach and maybe see a picture but you also want to know if researchers are puzzled over the possible alien glyphs they found written on the fin (or whatever).
Point being, that your blog post title is going to be the selling point for most readers. It will be the first thing they see and it will be the deciding factor in whether or not they want to read more.