Redraws this sprite as a looping animation, saved onto the sprite under this name. One sprite holds many named animations (walk, idle, attack…) - reusing a name replaces that animation, and you can swap the active one from the Project gallery's ANIMS button.
Your sprite is the rest pose the loop returns to; these are the freshly-drawn motion frames on top of it. Even 1 frame works - a simple bounce.
Lines starting with a frame number (like 2:) apply to that frame only; everything else describes the whole loop.
Higher strength pushes the pose change harder (squash & stretch); Subtle keeps it gentle.
Preselected to the quality this sprite was generated at - frames match the base best at the same tier.