• Checkboxes have three possible states: selected, unselected, and partial. Partial selection occurs when a parent has some of its children checkbox(es) selected.
• Checkboxes can be single or grouped. Groups can have a parent child relationship or just sit next to each other.
• If a user needs to perform additional steps before changes become effective a checkbox is the right component choice. If the change is immediate, a switch is the right choice.

For more information about when to use checkboxes or toggles, check out this article on UX Planet.