Marinade Finance is a Liquid staking protocol on Solana. Liquid staking is an alternative to traditional staking: it allows users to stake any amount of SOL and to effectively unstake their SOL without the requirement of waiting 1-3 days before the stake is warmed up or cooled down. Warming up or cooling down stake normally takes around ~3 days.
mSOL is a liquid stake pool token. The risks include Marinade delegated validators being dishonest and getting their SOL slashed when slashing is implemented on mainnet. Read more about Marinade's staking algorithm in their documentation.
How to Acquire mSOL
Head to Marinade's app and deposit SOL to receive mSOL.