At Zapier, a fully-remote company, the team uses custom Slack emoji reactions to quickly communicate and boost productivity. They've created thousands of unique emojis to speed up communication, including ones for polling teammates, agreeing or disagreeing with ideas, thanking others, acknowledging tough times, laughing out loud, and even using them to automate workflows. These custom emojis have become an integral part of their language, making it easy to quickly respond to messages without creating long threads or misinterpreting reactions. By leveraging these emojis, the team can make decisions faster, find messages more efficiently, and add a fun touch to their conversations.