A cryptocurrency airdrop is a marketing strategy designed to supplement or replace a coin offering. It helps to spread awareness of a particular token to appropriate audiences, such as potential investors or supporters of a specific blockchain project. They are also used as a means of pumping up a coin\'s value, by giving existing coin holders a bonus of free tokens, airdropped to their accounts in direct proportion to the total number of coins they already hold.

In order to make the airdrop, the project\'s development team needs to promote viral growth in awareness of the project through a system of referrals on social networks. There are cryptocurrency-dedicated forums for announcing an airdrop, such as BitcoinTalk.org, which are regularly scanned by interested parties. Announcements made on such a forum will be disseminated amongst social network and chat sites, which will spread the word to more people and stimulate further interest and investment.

On the predetermined date, a snapshot of the blockchain must be taken, and airdrop amounts calculated according to the number of tokens then held by existing investors. These amounts are then deposited into the token holders\' Ethereum wallets, increasing their holdings and encouraging them to invest further in the project.