That sounds like a typical clickbait hook.
There’s no “secret tool” hidden in comments that millions are unaware of in any meaningful or legitimate sense—this kind of phrasing is usually used to drive engagement and get clicks.
If you saw this on social media, it’s often one of these:
- A referral app or affiliate link disguised as a “secret trick”
- A basic feature (like a phone setting or website tool) being overhyped
- Or sometimes outright spam/scam content
If you want, paste what the “tool” or “1st comment” says here, and I can tell you exactly what it is and whether it’s useful or just hype.