Walking
Each step lifts and drops the camera and rocks it slightly, about twice a second. Walking smooths that bounce heavily while keeping the direction you walked in, and uses Smart zoom so the calm stretches keep more of the frame. If the result feels floaty, lower Smoothness a little.
Running and action cameras
Running smooths much harder than Recommended while still following where you went, and allows more zoom. Expect some frames to stay soft: running shakes the camera fast enough to blur it. Wide action-camera lenses help, since the same shake moves a wide picture less, but there are no lens profiles here, so the curved edges of a fisheye picture can still wobble a little. That is why Running uses Perspective: Warp, which Maximum and Jelly fix use, can turn a fisheye’s curve into extra wobble, so keep it for other footage.
Drones
A drone usually flies smoothly, then catches a gust. Drone keeps nearly the whole frame and steadies the sway; setting Analysis to Precise helps it follow the fine detail of distant landscapes. Fine vibration that bends the picture is a rolling-shutter problem, covered on the rolling shutter page.