In Minecraft's single-player and multiplayer modes, you have the ability to type in a chat box.

Mojang Studios is now releasing a new Minecraft: Java Edition snapshot, which, besides the usual fixes and technical updates, includes the new Chat Preview feature for servers to employ.

Commands are some of the most powerful ways to interact with your Minecraft worlds. These features can do things like apply permanent potion effects, change biomes, and even locate any structure.