If you've ever been on a full suspension mountain bike the suspension is so amazing that there are times when even substantial bumps are almost undetectable. That's not the experience with a gravel specific suspension fork. The travel is much less and the focus is different. Instead of eliminating bumps they dull them. You'll still feel rocks and washboards but they won't rattle your body in the same way and the tyre won't skip on and off the road surface. Depending on your background, it can feel a little bit surprising the first time you experience it.