Let’s say you’ve constructed a complicated filter on the Film Database page. For example, American action flicks from 2010 or later, ordered by number of rankings. But now you’ve decided that the film’s country isn’t important, and you’d like to remove the USA from the filter.
Before, there was no way to do that — you’d have had to remove the filter entirely and start over. But now, you can just click on the red button to wipe the “USA” filter away, keeping all the others.