A faucet is a giveaway system that transfers a small amount of cryptoassets to users freely or for completing simple tasks. Faucets are usually designed to increase the associated ecosystem's adoption.
The first and perhaps most notable faucet was the Bitcoin Faucet created by Gavin Anderson in 2010 to help Bitcoin’s adoption. It originally gave out 5 Bitcoin per visitor. This amount declined over time and was eventually shut down in 2012.