What does it mean when people say "competitive high school"?

Applying to College
38

<p>Is my school “competitive”? I know its not amazing, but is it decent enough?
AZ; not private; poor area; 50 kids
college prep; no AP/IB
Median SAT: 1280/1600 (CR + Math)
Median ACT: 27
88% go to college; 60% instate</p>