To boost productivity and efficiency in daily communications, Slack offers a range of useful slash commands that can be used to manage channels, set reminders, send GIFs, and more. With over 30 available slash commands, users can quickly access various features without having to navigate menus or click on buttons. These commands can be triggered by typing forward slashes (`/`) in the message field, allowing users to start typing what they want to do and browse related shortcuts. Some examples of useful slash commands include sending GIFs, setting reminders, managing channels, and toggling dark mode. By leveraging these features, users can save time, increase productivity, and enhance their overall Slack experience.