1. A very specific error message nodejs was giving me on one platform about ssl. I usually end up doing site:stackoverflow.com
2. A firmware upgrade for an NVR system (hunting through the manufacturer's website was futile, so I did a search site site:manufacturer.com)
And in both of these cases, while I was using ddg, I was only using it as an index into a specific site, rather than searching the internet.
Other things that I search for, I tend to go to a more direct search engine. If I want to know about a thing/person/event, I just search wikipedia. If I am looking up a band, I just search metal-archives or bandcamp. For movies/cast, straight to imdb. For computer products, straight to newegg. For news, I go straight to my preferred new sources. For Elixir questions, straight to elixir forums. Restaurants, straight to maps.
So, what is it everyone is actually using Google (or other general search engines) for?