The tabs don't load into memory unless you switch to that tab group. Also it's much easier to work with one window. You know how before tabs were invented, you

The tabs don't load into memory unless you switch to that tab group. Also it's much easier to work with one window. You know how before tabs were invented, you had to open each website in a new window. It was a pain in the ass. Tab groups is just the next step. They are like meta-tabs.