Connects to Strava to get up to date info and distance for your bikes and allows you to add / track individual components. Keeps track of your average mileage for consumables (chain, brake pads, etc). If your bike has electric shifting, then you can record and monitor your charging cycles so you have a better idea of how when you need a recharge. Also allows you to save receipts for your bike and accessories in case of any needed warranty issues.