Slack had become so popular because it changed the way teams functioned. Teams started by using the service to send instant messages to one another, and then often abandoned email in favor of it. But Slack wasn’t just for one-to-one messages. When a team used Slack, all of its employees were in a chat room, so they could communicate as a group. Soon, Slack replaced check-in meetings and phone calls. Teams used it to manage projects and stay up to speed on what the whole company was doing. They connected other software and services to Slack, so that everything was in one place. Slack became the
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