Slack is a real-time messaging tool that facilitates the management of work groups, saving time and centralizing communication, and above all triumphs at the business level, although it is recommended for all types of communities. Slack allows you to create workgroups between an unlimited number of members, hold private conversations, establish public and private channels or share files. That means that it can be useful, for example, for an autonomous designer who is developing a project for a company, or as in my case for a group of writers working for the same publisher or website. Slack is free (although it includes paid versions with more features), it is very intuitive and configurable and, in particular, it is integrated with other commonly used tools, such as Dropbox, Twitter, Google Drive, Trello or IFTTT. Slack also allows us to configure notifications to our liking: we can receive alerts from all of them, from private ones, from only those that mention us or from those that contain a specific word, that personalization also affects its appearance, since Slack puts our layout a series of themes to configure from the wallpaper to the sidebar. Includes emojis, allows searches (with filters) within channels and shows "previous" links or messages attached. Oh, and a very important detail: it has a mobile version (also free) so you can follow the group's news without having to be in front of the computer. In general I think Slack is the best application to keep your work organized and improve collaboration between work teams.
So far I have not found anything that I do not like about Slack, it just works and does it very well, the organization and communication in my work team has improved significantly.
If you need any application to improve communication on your computer, Slack is the best option, it is also intuitive, its platform is attractive and is FREE.
We have not been able to get a better tool to manage communication in our team, Slack makes it very easy to stay in touch, before it was a bit difficult for all team members to communicate, now that is no longer a problem, plus I must add that productivity at work has improved a lot.