when all checklists are

when the due date is marked asin a card

when a member is added to the board

when a cardis moved out of list

Immediate commands (no trigger)

Some actions can be executed immediately without a trigger. For example, this command:

sort list "To Do" by due date

will immediately sort the list after being entered.

Note that these actions can also be triggered, e.g.:

every day at 8am, sort list "To Do" by due date

Scripts (link-activated)

Scripts are a special kind of command that has an associated link, and it runs when someone clicks on the link.

The link can be in a card, an email, a website, etc. You can also use the link in conjunction with other automation tools such as Zapier or IFTTT to perform complex Trello actions that those tools don't support.

Read more about scripts here.