Open Minecraft and start your world or server
Make sure multiplayer is enabled
Use the pause menu and select Invite to Game if available
On Bedrock Edition, open the Friends or Invite menu
Add the person as a friend on your platform first if required
Share the server IP or invite code if playing on a server
Make sure both players are on the same Minecraft edition
Make sure both players are using compatible versions
If on Java Edition, add them to your whitelist if needed
If on a Realm, open Realm settings and invite them by gamertag or username
If on a local network, make sure both devices are on the same Wi-Fi
If using a server, give them the server address and port
Confirm they join from the multiplayer menu