Reputation is a measure of your advancement in Pizza Runner.   Reputation gains come from cash earned by doing deliveries and by obtaining the various achievements in the game.   Each level you earn in achievements adds greater reputation to your score.

E.g.

Achievement Level 1  – 5 Reputation

Achievement Level 2 – 10 Reputation

Achievement Level 3 – 15 Reputation

Achievement Level 4 – 20 Reputation

Reputation gains also benefit your Store Franchise that you selected at the start of the game; Crispy Crusts, Fash ‘n’ Fresh or Serious Slices.