Slack cuts the fat off of typed communication

Slack creates a stream of typed communication between various groups and channels. Groups could be thought of as different collectives of people that communicate for a general topic (e.g., you might join a group that focuses exclusively on WordPress and then another that focuses on Shopify). Within the groups there are also channels, which allow you to even further narrow down your focus of conversation (e.g., development, design, debugging, etc.). Easily-to-add links, attachments, and lots of third-party integrations make communication even more robust.