"Scrubbing and transport control" what it refers to?

Hi, I’m new here. And English is not my first language. I see “Scrubbing and Transport Control” is one of the edits features of Shotcut. But I have no idea what this refers to. Could anyone help me know this?

For “scrubbing” description in English

Transport controls are the controls for the player: play, pause, rewind, fast forward, previous, next.

Thanks a lot !!!