You will now be able to mute conversations forever on WhatsApp on iOS and Android1
Previously, WhatsApp had an option to mute notifications on specific chats, but the longest mute period was one year. Now, after the update for the app, users will be able to mute a conversation forever, and it won’t automatically un-mute itself. This can be helpful for some people who would like to mute a conversation and not have it un-mute itself when the selected time period had run out.
To mute a chat or conversation, you have to long-press on a chat, then select the mute icon, and pick “Always”. The new feature works for both individual chats and group chats.
In order to get this new update for your Android phone or iPhone, you have to download the newest WhatsApp version from the Google Play Store or from the App Store.