What's the best platform to find ideas for building things that people actually want/need?

I've seen several Tweets where folks ask for a product/service that doesn't exist yet. Is there any platform listing "Requests for Startups" that have been validated by a real audience?
Ryan KopinskyMaker 👨🏻‍💻 · Asked

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Request for Startup

Share and discover great startup ideas people actually want

Ryan Hoover44Founder, Product Hunt · Written
Here's a project that scrapes Twitter for startup ideas; however, I'm not sure this is the best place to look for inspiration. Instead I might try to solve problems you experience in your life or try to identify a pattern of inefficiencies that you might be able to improve upon (e.g. Taxi --> Uber).
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