Faster? Possibly. Better climber? Possibly. It all depends on how you use the data, such as HR, cadence, estimated (or actual) Watts on a given segment of your ride. Being able to easily compare an exact part of a ride that you do several times per season (or week, month, however often) makes it very easy to tell if you are making progress or holding the line. So, yeah... possibly make you faster and a better climber. The one thing I can promise everyone here that Strava absolutely will NOT do, though, is pedal your bike for you. You have to put in the effort.