Where can I find airdrop?

I'm curious to know, could you please guide me on where I can find information about airdrops? I've heard about this concept in the cryptocurrency world, but I'm not quite sure where to start looking. Are there any specific platforms or websites that regularly announce airdrops? Also, is there a way to filter out the legitimate airdrops from the potential scams? I'd appreciate any pointers you could provide to help me navigate this exciting yet potentially risky aspect of crypto.