A checklist is a list where every item has a checkbox you can tick.
Adding one
On desktop, type / and choose Checklist, or use the checklist button in the toolbar. On mobile, tap the checklist button on the toolbar above the keyboard. Pressing return adds the next item, and pressing return on an empty item ends the list.
Ticking things off
Click or tap the checkbox. Checked items stay in place with their box ticked, so the note keeps a record of what got done rather than making it vanish.
Moving items
On iPhone, iPad and Android, hold the circle in front of an item for a moment until it lifts off the note, then drag it up or down. The other items move aside to show where it will land, and it drops there when you let go. A quick tap still ticks the box; only a hold picks the item up.
Items nested under it come along, and a nested item moves among the items of its own list. If you drop it in the wrong place, undo puts it back.
A pattern that works
Keep one running to do note and pin it so it stays at the top of the list. New tasks go at the top, finished ones get ticked, and once a week you delete the ticked ones. It is low ceremony and it survives busy weeks. On iPhone, the Unchecked widget puts that note's list on the home screen and lets you tick items off from there.
Tasks inside other notes
Checklists work anywhere, so meeting notes can end with a short list of actions right where they were decided. If you want to find them again later, add a tag like #todo next to the list.