That is it's purpose, but if you plan for a permanent install, you can omit this and stick the mount directly to the windshield. If you use this follow the glass cleaning directions below first.
When mounting a cam, the glass must be super-clean. After using your usual cleaner, wipe the place with isopropyl alcohol followed by a clean dry paper towel. Place the mount where you want it, them press and hold it for a minute or two. Wait 24 hours before putting weight (the cam) on the mount. Best to do when temperatures are warmer, not below freezing.
Phil