Customer reviews are one of the most underrated sources of business ideas. Every complaint is basically someone saying, “I wish this product did X.”
Go to Amazon, Trustpilot, or G2 — pick a category that interests you. Read the 3-star reviews first. They’re usually the most honest. People explain what worked, what didn’t, and what’s missing.
If you start noticing the same frustration again and again — that’s your signal. Maybe the product solves 80% of their problem but not the last 20%. Those gaps are where new businesses are born.
Reading reviews is like free customer research — thousands of people are literally telling you what they wish someone built.