* Buying a sofa. You want to filter for sofas of a specific size, with certain features, marketing sites want to feed you a bunch of marketing slop for each sofa before giving you the details . This generalises to many domains.
* You have a few friends who are still stuck on Facebook, you want to be notified if they post anything and avoid other rubbish
* The local neighborhood is stuck organising in a Facebook group or even worse, nextdoor. You want to see any new posts except for those couple of guys who are always posting the same thing.
* A government consultation website has been put up, but as a hurdle the consultation document has been combinatorially expanded to 763 pages by bureaucratic authoring techniques. You want to undo the combinatorial expansion do you can identify things you actually care about.