WhatsApp Albums: this is the name of the new feature that WhatsApp is developing.
Thanks to albums, you will be able to share multiple photos at once (recently Instagram introduced the same feature for its app).
To create an album, you have to share/receive 4+ photos.
It’s possible to peek on single photos of an album in order to get a preview, and you can easily forward and delete photos contained in the album.
When you delete all photos of an album (or you keep only 3 items), the album will disappear.
Note that this feature is disabled by default and it will be enabled in next updates, as it is happened for Siri (introduced as hidden feature in 2.17.1 and available for all in 2.17.20).
Note that this feature will be developed also for other platforms.