Latest version of WhatsApp
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Open WhatsApp on your smartphone
Head to any chat window and tap on it
Now, tap on the three-horizontal dots from the top right corner and choose the Mute option
Here’s you’ll see three options — 8 hours, 1 week and Always. Choose Always to mute the chat permanently.
Users can also select the Show notifications option from the same popup window in case they want WhatsApp to show the notifications of the particular chat in the notification panel silently.
To unmute a chat, head to the particular chat window again and tap on thee dots from the top right corner and select the Unmute notifications option.