Masks help. They really do.
If you are serious, yes they do. I never know in here. They aren't 100% but they are better than nothing if you tolerate them. I wore the N95 at work off and on for almost 40 years and the fabric are much better tolerated for most people for shopping trips, trips to the doctor, etc. There is NO reason to wear any of them outside for exercise or when you aren't in close contact with other people. Most of the COVID warnings are over done IMO.
The one I like the best is driving around in your car with one on. LOL.