WhatsApp beta has been updated quite a lot lately, and this update is a small incremental update to it. This update brings in two new features that have been already added to Android and iOS.
This new update, version 2.17.218, lets you select multiple chats at the same time. You can select messages in Chat tab and pin/unpin and mute/unmute. Recall feature is also included in this update, which can delete mistakenly sent messages.
The screenshots explain well what we mean:
Although these features are included in the update, the features are still half-baked. It should take it another few updates for them to be usable for beta users. Recall feature is still waiting to be remotely activated from the server-side, which might happen soon.
You can get the update from the Store link below. The beta is open for all.