There are two ways to do this:
1. Drag the card to any column. To do this, move the cursor over the card, hold down the left mouse button and, without releasing it, move the cursor to the desired column.
2. Open the card and click on the arrow button. This will move the card to the next column.
To move a card to a different space and board, you need to:
1. Click on the three dots in the upper right corner of the card → "Move to"
2. In the menu that opens, select the space and the board where to move the card. At the end, click "Move"