How to enable WhatsApp pop-up notification feature on Android | very easy way to chat on WhatsApp

Most of us don't concern about this feature yet.this pop-up feature makes our lives easier nd better. You can chat on whatsapp without opening WhatsApp app. How to enable pop-up : 1. Open whatsapp. 2. Go to "settings". 3.Then "Notifications". 4.under " message notification" click on "pop-up notification" 5. Then select "always show pop-up"(4th one). 6.it was enabled now.