What is the difference between "Hide Tracks" and "Hide Marked tracks"

Create Studio gives you the option to hide elements and tracks.
Clicking the eye icon will hide the element from the canvas. Hidden elements will not be included in the published video.

The hide marked track option will show/hide selected tracks, this helps in preventing the tracks from being accidentally edited or deleted when you want to keep them in place. Elements in the hidden tracks are still included in the published video.