Starred messages are super handy when you want to save an important text or media file and get back to it later, like the phone number of the doctor you have to contact or the address of that event you have to be at. To star a message, you tap and hold on it, then tap the star button that shows up at the top. You do the same to remove the star. All of your favorite messages are accessible from the overflow menu inside the app and are organized chronologically with the contact’s name visible to easily find the one you’re looking for.
As for Direct Share, it only works on Android 6.0 Marshmallow and lets you quickly choose a contact to share with, most likely among the last few persons you talked to. That’s one step faster than choosing WhatsApp and then picking a contact name.
Here’s what the “Whats New!” section says on Play Store.
With all of these changes going live on the Play Store, everyone gets to enjoy the goodies, not just those of us who install every beta that the developers release. So now you’ll likely receive rich link previews instead of just sending them. Grab the update from the Play Store at the link below. It’s on APK Mirror as well, if you need the installation file. Source