improve, better, help, ameliorate mean to make more acceptable or to bring nearer a standard. improve and better are general and interchangeable and apply to what can be made better whether it is good or bad.
[usually singular] something that is preferable: the better of two choices. Usually, betters. [plural] those superior to oneself: Stop thinking of them as your betters.
1. better adjective. ['ˈbɛtɝ'] (comparative of `good') superior to another (of the same class or set or kind) in excellence or quality or desirability or suitability; more highly skilled than another.
To be better off, to be in superior circumstances; To be better than one's self, to do more than one had promised; To get the better of, to gain the advantage over.
Better and good are both positive qualities, but they have different levels of intensity. Good typically refers to something that meets a satisfactory standard or is acceptable, while better implies an improvement or enhancement over something else.
Don't you have something better to do than to watch TV all day? What better way to kick off the New Year than with a new watch on your wrist? The passing attack wasn't much better for most of the game. This is a no-brainer, but the best way to get better is simply to play.