How to add Pulse to my Slack workspace?

You can access Pulse via the link here. Once on the page, click the ‘Add to Slack’ button.  You will then be asked to grant Pulse permission to access your Slack workspace to enable automatic status.

By default, any workspace member can install apps to Slack.  If your Slack admin has enabled the Approved Apps setting that requires all custom and third-party apps to be pre-approved by the workspace admin prior to usage, then you will need to contact your Slack admin to get Pulse approved as an application and installed.