If you're part of an email conversation that's no longer relevant to you, but is still seeing a lot of activity, you can mute it so that you don't keep getting notifications from it.
If you’ve muted a conversation by mistake, or are just taking interest in it again, you can unmute it.
Select a muted email conversation.
Click the More actions ? button on the toolbar.
Select Unmute.
The conversation is unmuted, although it remains only visible in All Mail view until you move it back to the Inbox, or until a new message in it arrives.