It was the Desktop App. The Holy Land.
Moving your collaboration from a browser tab to a dedicated application can significantly boost focus and productivity. The desktop app provides a more robust experience, offering granular notification controls and a permanent place on your taskbar. Quick Guide: How to Open Slack in the Desktop App open slack in desktop app
If you are currently signed in via a web browser, you can quickly transition to the desktop version using these steps: It was the Desktop App
: Go to your workspace in the browser, click your workspace name in the top left, and select "Open the Slack desktop app." open slack in desktop app