While in Edge Browse you can "set aside" groups of tabs so you can restore them later. The benefit of using this feature is that it allows you to avoid visual clutter and save memory at the same time. Here's how to set aside and restore tabs in Edge Browser.
The set aside feature works on all tabs in a window.
Step 1: Click on the "set aside" button which is second from the left corner of the Edge window (it looks like a 'window' with an arrow pointing back)
Step 2: To restore a window, Click the button in the upper left corner of the Edge window (it looks like two windows) to see a list of tabs you've set aside
A sidebar with a list of set aside tab groups appears.
Step 3: Click "Restore Tabs" next to a group to load all the tabs in that group at once
Click an individual tab icon to restore just that tab.