GameplayConfig Asset Editor

I'm trying to mess around with the gameplayconfig section of the asset editor and made it to the section that defines all properties of movement. I made a copy to override and began to change some values like base speed (changed it from 5.5 to 10 to make it obvious) but nothing changed in my world. I tried this with some other properties and the same. How else am I supposed to change this to make the effects work? There are lots of things in this asset editor I don't understand how to change or what they mean but there isn't much documentation.