This is where you can text on an Apple Watch.
Currently, you cannot delete individual messages with the Apple Watch.
Use this method if you want to mute certain conversations in Messages without silencing all notifications.
The message thread will be muted. To unmute, swipe left on the message thread and tap the Mute icon again.
You see a list of your most recent messages and pinned messages at the top. Deleting conversations on your iPhone may not delete them from your Apple Watch. Make sure your iPhone is paired with your Apple Watch.
You can also tap Edit in the top-left corner, then Select Messages to select multiple message threads. Check the box next to each message, then tap Delete in the bottom-right corner.
You see a list of your most recent messages and pinned messages at the top. This method will delete the message from your phone, but it will not unsend or delete it from the recipient’s device.
Messages will switch to Edit mode. If you need to delete another message, you can check the circle to select it.