A Snapshot is a decentralized voting system. It provides flexibility on how voting power is calculated for a vote. Snapshot supports various voting types to cater to the needs of different organizations. Creating proposals and voting on Snapshot is user-friendly and does not require gas fees as the process is performed off-chain.

With Snapshot:

• Anyone can create a proposal and allow community members to vote on it. No gas fee required.
• Votes are signed messages. They can't be duplicated and are easily verified online.
• Multiple voting systems - single choice, approval voting, quadratic voting, and more.
• Flexible voting strategies to calculate voting results - you can vote with ERC20s, NFTs, other contracts.
• Open-source with MIT license.

Read more about Snapshot here. Sushi’s Snapshot page can be found here.