Airdrops are essentially free coins that are sent to your wallet by projects that want to build a community. You will notice that often these coins are sent to your wallet without you having to do anything. However, in order to find the most lucrative airdrops, you will have to do some research and participate manually. An excellent place to get started is the popular site Airdrop Alert.
TOP 5 ALTCOINS ON ETHEREUM READY TO EXPLODE IN 2020 - (Best Crypto Investments?)