Step up (one's) game informal verb phrase
To enhance one's performance, or the quality of one's work in order to do as well as others
My brother has got an A in Math. I need to step up my game if I want to receive a special gift from my parents.
It seems that you need to step up your game if you wanna compete with her.
Rapidly or quickly; rapid increase, progress or development
To boost one's knowlege and experience
To change someone or something into the good condition that you would like
The verb "step" should be conjugated according to its tense.
Daughter: So I really want all my friends to have a great time. I was thinking it would be a good idea to have some candy out on the tables for people to snack on.
Mother: Well, if you want them to really enjoy themselves, candy is dandy but liquor is quicker.