I frequently use it to search (and reverse-search) products, specifically modern interior design objects. Often things show up in blog feeds or on Instagram where it's been reblogged from some source, and I want the original page that describes what it is. Or I use image search by text to try to identify pieces that I can describe in words ("leather bauhaus lounge rocker 60s chrome" or whatever).

Many other use cases. "iPhone case" -> browse cases, see one you like, find the page where it's sold (effectively a federated shopping search). Or "New England bed and breakfast" as a way to find somewhere cute to travel.