Messaging apps are only good when many people use them. That's why the market is dominated by a few big players like WhatsApp, Facebook Messenger, and good ol' text messages. Other platforms have to find ways to incentivize people to switch to them, and one way to do that is by offering features the leaders don't yet have. That's why Viber is introducing Create a Sticker, allowing you to make and share your own sticker sets without leaving the app.

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