I'm learning Adobe Illustrator and have been following this video: Badge Drawing from 3:20 in the video she mentions hold "Shift" and click on the edge of the object with the "Group Selection" tool and then press delete. When she does that it deletes everything else (not sure why - side question: what does "Shift" click do here?).
Once deleted she gets a whole object.
When I click slightly different to her or follow her exactly I can see two results.
When following her I get the same whole object, but if I click instead on the white body of that stroke (just under the edge or around the edge) and then press delete I get the same white body but instead of it being a whole object I get a doughnut shape where I have a hole in the middle. My question is why does it matter where I click, what difference is the edge giving compared to the body click?
Click on Edge:
When clicking on body