An airdrop in crypto is a marketing strategy used to promote crypto projects. It involves sending free tokens of the project to a select set of users from the project's community to drive engagement.
A crypto airdrop could see a project send tokens to hundreds or even thousands of users' wallets in the hope that they will spread the word and increase the project's visibility in the market. Airdrops are part of promotional campaigns by crypto projects to raise awareness about new developments or initiatives.
In most cases, projects shortlist user addresses to send airdrops to by asking them to create an account with their project, follow them on social media, like and share their posts, etc. In some instances, users could receive free airdrops without taking any action.