Bookmarks can be used to mark places in the code, like the code that you might want to jump back and forward. Bookmarks can be related to task list shortcuts, kind of the same functinality.
The bookmarks can be setup very easy, by pressing Ctrl+K, Ctrl+K to leave bookmark.
Ctrl+K
For navigation, you can press Ctrl+K, Ctrl+N to move to the next bookmark, or Ctrl+K, CTRL+P for the previous bookmark. It's easy, just try it now.
Ctrl+N
CTRL+P