Are free airdrops legit?

Could you please elaborate on the legitimacy of free airdrops in the world of cryptocurrency? I've heard mixed opinions and I'm curious to know if there's a clear-cut answer to this question. Are these free giveaways genuine opportunities to earn digital assets, or are they often scams designed to deceive unsuspecting individuals? Additionally, if they are legitimate, what factors should one consider before participating in an airdrop? I'd appreciate your insights on this matter.