Accuracy in playing the guitar matters a lot. In fact, you should play the note acid is and how it should be playing and you should play a note that you intend to play, not by accident. Inaccurate guitar playing will not sound good. Matter of fact, it will sound like crap. Good thing there is an exercise for guitar playing that improves a lot of things related to your accuracy. By practicing it hard enough, it will definitely improve your fretting accuracy at the same time it also enhance your alternate picking. Another thing that it does is it stretches your fingers, and stretching it permanently to improve your reach. It also improves your entire guitar solo skills. All of these benefits in one exercise.
Okay, let us start. I assume that you already know about alternate picking. The exercise is done by alternately picking a set of notes. Do it over and over again and make sure that he only hit the notes that are meant to be hit and pick the only notes that are meant to be picked. This way you will improve your accuracy. If you make a mistake by hitting a note that wasn’t supposed to be hit, start from the beginning.