The Strava Garmin partnership combines the best features of the two biggest players in the training tracking market. The seamless Starva Garmin integration means they work perfectly together with little or no user input.
Once you're connected, activities uploaded to Garmin Connect via bluetooth or computer will automatically sync to Strava so you can streamline your workout routine.

The Strava Garmin integration puts these popular Strava features on your Garmin.

Strava Garmin Beacon Integration

An important safety feature. Beacon gives you and your loved ones peace of mind wherever you are. Pair your Garmin with your smartphone and let friends and family track your location and progress.

Strava Garmin Live Segment Integration

See performance updates on your favorite Strava segments as you ride them. Get alerted as you approach the start of a segment and then check how you're stacking up against your PR, nearest Strava friend or the overall leader as you ride.

Strava Garmin Edge 1030 Segment Explore and Marquee Segments Integration

Garmin Edge 1030 users get an even better Live Segments experience with more ways to compare your training efforts. Segment-explorer includes on-device navigation and shows the top segments nearby making it easy to find the best places to ride.

Strava Garmin Routes Integration

Routes lets you navigate your favorite routes from Strava, or sync routes you've designed yourself using Strava route builder. With Strava routes on Garmin, you can upload custom courses or use your previous activities and those of your friends.

Strava Garmin Real-Time Relative Effort Integration

Relative effort lets you see how much work you’re putting into your training in real-time. Relative Effort shows you a personalized measurement based on your heart rate zones.
Strava and Garmin are the perfect combination. As well as having a whole host of powerful training features Strava is the Facebook of training and a great motivational tool to keep you on track.
If you’re using Strava on Garmin you might want to join one of these Strava clubs which both have very large and active memberships:

Strava Garmin Edge Cycling Club (25494 members)
Strava Garmin Forerunners Running Club (37570 members)