If you want to read a great overview upfront about curation and opportunities that arise from this, let it be Infobesity: the splendour and misery of curation overload from Marie Dollé.
Something I find amazing is that there are posts out there filled with product ideas and concepts around curation & discovery, and people literally begging for them to be turned into solutions. So check that "desirability" box.
Another angle on discovery is to find better ways to access the sheer amount of apps, podcasts, and newsletters out there. There are almost 3 million apps on Google Play, Apples' App Store is almost at 2 million. There are tens of thousands of newsletters on Substack alone and god knows how many podcasts. Finding the nuggets on this claim is figuratively a gold mine. And I'm not talking recommendations here, but discoverability and information extraction. In issue 369 of Benedict's Newsletter, he wrote:
"So, what does any content platform do when it has 100m users and 1m creators? The leader boards break, and search probably breaks too. Now what? Apple’s app store was paralysed by that for years. Yahoo's directory was killed by search. FB built algorithms. Now see Substack (and Clubhouse, another hot content app of the moment). How does discovery work at scale? That isn't just a high-quality problem - 'what happens when there is more stuff on your platform than anyone can look at?' is an essential, existential question - it can define the whole of what your product really means."
Closing this topic, be warned about the "I can build this on a weekend with tools 1 through 10" fallacy, or don't step into the "isn't that just Evernote or Notion" trap when thinking about "feasibility". Don't think about just features. Think about building an experience.
And of course find a business model because, at the end of the day, your solution has to be "viable."