What does the "Garmin Connect Uploads" feature do?
Garmin Connect Uploads allows you to upload Garmin Power Course files directly to your Garmin Connect account (no more manual file downloading and moving). This feature is located on each of the race details pages making it easier to get BBS courses to your Garmin device for training and racing.
Use your Garmin Power Course files on a Garmin Edge device during a race or training ride to have power alerts pop up at the bottom of your screen to indicate the proper power target based on specific latitude and longitude points along the course. Currently these files are compatible with 520/30, 820/30, 1030, 945 and The Fenix Series of watches (5 series and up).