What do options for keyboard shortcut in Window Rules mean?

In the System Settings/Windows Management/Window Rules in the Arrangement & Access section one can add keyboard shortcut and set one of the following options:

  • Apply Initially
  • Apply Now
  • Remember
  • Do Not Affect
  • Force
  • Force Temporarily

I tried to find what these options do but there’s no information about them in the docs. Does someone know?