A free airdrop refers to a marketing tactic employed by companies and projects, particularly in the cryptocurrency space, to distribute tokens or coins to a wide audience at no cost. Participants typically receive these tokens as a reward for completing certain actions, such as joining a community, engaging on social media, or signing up for a newsletter. Airdrops are often used to bootstrap a project's user base, increase token distribution, and foster community engagement. Participants can benefit from receiving tokens that may have future value, while projects gain exposure and build a supportive community around their offerings.