The latest version of WhatsApp beta now includes a new chat pinning feature. As the name suggests, it allows you to pin individual chats or groups at the top of the chats tab. If you have certain groups or chats that you frequently use, you can pin them at the top. For now, you can only pin 3 different chats in the latest beta version. It's still better than nothing.
How To Pin ChatsTo pin a chat, tap and hold it and you will see a 'pin' option next to archive and mute options at the top of your screen. If you try pinning more than 3 chats you will get a message from WhatsApp telling you that you can't pin any more chats.
WhatsApp StoriesEarlier Facebook added the popular SnapChat Stories feature to WhatsApp. Instagram got the feature a while ago.
You can try out the new feature for yourself by downloading the beta APK here (for Android users only). Proceed with caution as beta versions of any app are prone to having bugs, glitches and other issues.