Use 'check off' to express a sense of accomplishment when finishing tasks. She checked off the last item and felt a wave of satisfaction.
Pro Tip 2/3
Visual Progress
'Check off' often implies visual marking on physical or digital lists to track progress. He checked off another chapter, seeing his progress on the reading list.
Pro Tip 3/3
Sequential Tasks
Use 'check off' when tasks are done in a sequence, symbolizing moving down a checklist. After the meeting, Mona checked off several action items.