It designates the selected vertex as the center and moves together with the neighboring vertices as if they are attracted by magnet.
This command is only available for the current object.
It sets up how magnet works.
It shows three arrows along with X/Y/Z axes, and you can move along with X/Y/Z axes with dragging.
It moves affecting the selected vertices only.
If you check this item, it moves according to not spatial distance but distance of joined faces.
It sets up how far magnet has an influence by dragging from the selected point.