You may want to move cards between decks for a variety of reasons, for example:
- you accidentally put them in the wrong deck
- you made a single large deck and want to break it into several smaller ones
- you made several small decks and want to combine them into a larger one
The browser offers a Change Deck option in the menu bar for these kinds of tasks.
See also Merging/combining two decks for more precise instructions for that exact situation.
If you want to move cards between profiles, or share cards with other people, you can use Anki's export function to export a packaged deck. If you want to share or move to a new profile only some of the cards in a deck, you can first use the change deck option above to move them into a temporary deck, then export that deck.