Small team communication with Slack

We have started using Slack in our research lab a few months ago, and it has proven very helpful so far. One of the features I like the most is the ability to upload and share documents, such as SOPs. Also the ability to create different channels with different collaborators. It makes things straight forward, especially when it comes to discussing matters related to a particular project in which only some of the group is part of. It avoids conversations that can be useless to certain people.