A lot of the question we get from our users are the same one: “How do I use the stickers?”. This is something we hope Apple will address in future. But for now, if you get this same question, share this video with them:
Load iMessage and tap the Right Arrow/App Store Icon on the bottom left
Click the 4 Squares to bring up the sticker dashboard.
Tap on the Plus sign to browse the Sticker Store or manage