Brands, celebrities, and marketers know that we spend so much of our time on our phones. But traditional pop-ups and banner ads don’t work well on those small screens. Emoji, however, increasingly rule our digital interactions. Sure, we, the people, have to choose to download and use a corporation or celebrity’s emoji, stickers, or GIF keyboards. But once we do, brands have a direct connection into our private messages, the place on our phones where we pay the most attention.