WhatsApp for Android will be able to multicast
The first change was the ability to send or forward messages to multiple contacts or groups. Prior to this, send a message or a file could only be one person or a group at a time, so in the event of a mass mailing had to repeat the same action multiple times.
Also in the new beta is an opportunity to write a quick message or send a file to three people with whom you most frequently communicate with, or recent contacts.
In addition to these changes in the coming months should see WhatsApp support GIF-animations, video calls, the ability to add captions for images and other innovations.
The new version of WhatsApp to support multicast is not yet available in all regions.