Use Sorters to automatically organize your completed downloads. For example, put all episodes from a series in a season-specific folder. Or, put movies in a folder named after the movie.

Sorters are tried in order of appearance and can be reordered by dragging and dropping.
The first active sorter that matches both the affected category and job type is applied.

More options are available when Advanced Settings is checked.
Detailed information can be found on the Wiki.