/msg

Syntax

/msg <targets> <message>

/tell ... (the same as /msg)

/w ... (the same as /msg)

Argument	Kind of value	What to type
<targets>	Target selector	The player or players who receive the message: a player name or a target selector that only matches players. One or more players.
<message>	Message	The text to send. It can contain spaces and runs to the end of the line.

Permission level	0: every player
Works in	Everyone can use it: no operator status or cheats needed. Works in singleplayer, on multiplayer servers, in command blocks and in functions.
Short forms	/tell and /w
Result	Each recipient sees "<sender> whispers to you: <message>" and the sender sees "You whisper to <player>: <message>" for each recipient. The number /execute store saves is the number of players the message was sent to.
Aliases	/tell and /w work exactly like /msg.
Selectors	Choosing recipients with a target selector such as @a needs permission level 2. Without it, type the player's name. Selectors inside the message text are also only replaced with names for senders with level 2.
Only players	Recipients must be players who are online. If no player matches, the command fails.
Filtered messages	If the server's chat filter hides the whole message from a recipient, the sender is told "The server has hidden your message for some players."

/msg Steve Meet me at spawn

Whispers "Meet me at spawn" to Steve.

/tell Alex Thanks for the trade

Whispers to Alex using the /tell alias.

/w Steve I found a Stronghold

Whispers to Steve using the /w alias.

/msg @a[distance=..10] Follow me

Whispers to every player within 10 blocks (needs permission level 2 for the selector).

/msg @a The event starts in 5 minutes

Whispers the same message to every player online.