Click here to create a Slack account. Select your email domain from the dropdown list.
Slack allows for direct private messaging with any other Slack member, impromptu group messaging, and group messaging within persistent Channels. When you sign up for Slack, you can click on “Channels” and join any that interest you.
You can use Slack on the web through any browser, but you’ll likely also want to download the Slack client to your computer.