Plain meaning
Start with the shortest useful explanation before going deeper.
A token distribution mechanism that gradually unlocks tokens to recipients over a predefined schedule rather than all at once. Vesting aligns long-term incentives for team members, investors, and advisors by preventing immediate selling. Typical vesting schedules on Solana range from 1-4 years. On-chain vesting programs (e.g., Streamflow, Bonfida) lock tokens in escrow accounts and release them according to the schedule.