Hi Dana,

I can't say which is better to use without understanding the context.

It's true that they both mean " to walk" but in what context do you have in mind?

Walking alone would suggest to me       "Je me promène" rather than  "Je marche"

Jim

se promener -- to take a walk.

There is a lesson on this: Expressing "to walk" with se promener/promener/marcher/aller à pied in French