Which card do I do next?

Head to the Trello Power-Up Marketplace, search for “Card Priority” and click Add. There is nothing to configure: the four levels are usable straight away, with no popup on enable, no authorization step and no account to create.

Open the card and press Priority — in the card’s button list, or the Priority badge at the top of the card back. Both open the same list of four levels; picking one writes it and closes the popup. On a card that already has a priority the list also offers Clear, which removes the value rather than setting it to “none”.

Yes — open the Power-Up’s settings from the board menu or the board button (its Settings item, when there are P1 cards). Each of the four levels takes a name of up to 20 characters and a colour from Trello’s badge palette: green, yellow, orange, red, purple, blue, pink or light grey. The badge always keeps its P-number in front of the name, so P1 stays recognisable as P1. Every level needs a name — leave one blank and the form says so instead of saving.

It appears in a list’s own sort menu, alongside Trello’s date and name options. Running it puts the P1 cards at the top, then P2, P3 and P4, with every card that has no priority at the bottom — and within any of those groups the cards keep the order they were already in. It is a one-off reorder of that list, only when you ask for it.

Yes. A card’s priority, and the names and colours of the four levels, are all stored on the board and shared by every member, so a P1 reads the same for the whole team. Board observers see the badges too, but Trello doesn’t let them change one — if they try, the card says the priority couldn’t be saved.

Free, with no card and no account. Priorities are kept in Trello’s own card data and the badges are drawn in your browser, so there is no server to run and nothing to send anywhere — which is what makes free sustainable.