Fame is how many people know your name. Impact is how many people are different because you existed.

Reach and effect look similar from a distance and have almost nothing to do with each other. Millions can know a name and be entirely unchanged by it, while one teacher or one friend can permanently alter how a handful of people move through the world. The second number is smaller and considerably harder to fake.

Ask honestly how many lives run differently because you have been around, and expect a small figure. Then work on making it slightly larger in one direction, which nearly always means going deeper with a few rather than wider with everybody.