A raid is the moment your server stops being a community and starts being a crime scene. Twenty bots join in 10 seconds, post slurs in every channel, and your mods are still asleep. Verification gateways stop this before it happens.
Source: [Dev.to](https://dev.to/julius_06ca97c5810ce59566/how-to-stop-discord-raids-before-they-start-a-verification-gateway-guide-1059)