: Most public servers require you to register your password in the chat when you first join by typing /register [password] [password] . How to Download and Host Your Own Server

If you want to create a private world for friends, you must download the server software and run it on your PC. How To Join a Minecraft Server on PC (Java Edition)

Searching for "minecraft online server download" usually refers to one of two things: an existing online world or hosting your own server software. How to Join an Online Server