Are there any benefits to smoking weed?

I’ve heard that it can have health benefits, but some of the stuff I’ve seen really sucks. Are there any benefits, or ways to counteract the bad things that weed does? What would be a good moderation to smoke it in? (Like the time needed for the effects of one joint to wear off?)

I’m just wondering because I’ve heard that it actually helps athsma.

Do any of you have experience with smoking weed?