This server is called BetaBuddies and it runs on Minecraft beta 1.7.3. It is vanilla so it feels like old school Minecraft with no crazy extra stuff.
The server is trying to grow a small but active community. The vibe is friendly and chill and people are supposed to be kind to each other. Bullying is not allowed.
There are rules against hate speech and hateful symbols. You also are not allowed to grief or steal or cheat. They want people to build and play without worrying someone will ruin their stuff.
They also ask players to avoid memes and jokes that are too explicit or offensive like gore or racism or sexism. The whole point is to keep the place nice and fun so everyone can relax and just enjoy beta Minecraft.
If you want a simple beta 1.7.3 world with a small nice community this feels like a cool place to try.

