This command displays a formatted text message (JSON message) directly in the player's chat.

/ctellraw <message>

• This command is pretty much the same as /tellraw @s <message> where the target is the player itself. To learn more about how to use it see the /tellraw page on the Minecraft wiki.
• The <message> is a text component, also known as raw JSON text. To learn more about it, see the Text component format page on the Minecraft wiki.