That phrase is a common clickbait hook. It’s designed to make people curious without saying what the “trick” actually is.
A more accurate way to say it would be:
“This is a clever trick that many people find useful.”
or
“Whoever came up with this idea was very creative.”
Claiming someone has an “incredibly high IQ” based on a trick isn’t something that can be supported. IQ can’t be inferred from a single idea or hack.
If you saw this as the start of a video or post, feel free to share the rest of it. I can help determine whether the trick is genuinely useful or just another misleading viral claim.