Are airdrops real money?

I've been hearing a lot about airdrops in the cryptocurrency community, and I'm quite curious about them. Are airdrops really a way to get real money just by receiving some tokens? Or is it just another marketing gimmick? Could you explain to me how they work and if there's any real value in them? I've read that some projects distribute tokens to their community members as a reward, but how does that translate into actual financial gains? Is there any risk involved in participating in airdrops? I'd like to understand this concept better before jumping in.