Slacked surpassed two million daily users less than three years after its launch in 2013. Slack gives you a centralized place to communicate with your colleagues through instant messages and in chat rooms, which can reduce the time you have to spend on e-mail. Whether you’re on a mobile device or a desktop computer, you can upload files, get and manipulate information stored in spreadsheets or other business applications, and easily search through past conversations.
Although many of the core features have been around since the 1990s, its popularity comes about because more and more people now get work done on mobile devices, in collaboration with people who aren’t always in the same office at the same time. Slack funnels messages into streams that everyone who works together can see. Slack messages tend to be short and casual, much more like the mobile text messages that people are increasingly favoring over e-mail.