They are usually taken when a child struggles in school. The actionable item is 1. IQ is low, they probably need tutoring or special education classes; 2. IQ is high, they are probably too bored and need harder classes or some other intervention; 3. IQ is normal, probably it's some other issue.
As an adult the actionable item may be to adjust your expectations of yourself. For example if I'm 90IQ and beating myself up about not being a 10x dev despite my efforts, or if I'm 150IQ and feel too unqualified for some intellectual endeavor, I could make adjustments after knowing the truth.
I took one as an adult and my impetus was that I am contrarian about a lot of things, i.e. there are a lot of things I believe that most people don't believe. I wanted to know if I was just a midwit being an idiot contrarian or if there's at least some reason to believe I might have a better idea about things than average people. In the end I scored very highly, so I can now feel more comfortable trusting my own judgement. If I had scored much lower, I would accept I'm probably wrong about a lot more things and stop having such strong opinions.
As an adult the actionable item may be to adjust your expectations of yourself. For example if I'm 90IQ and beating myself up about not being a 10x dev despite my efforts, or if I'm 150IQ and feel too unqualified for some intellectual endeavor, I could make adjustments after knowing the truth.
I took one as an adult and my impetus was that I am contrarian about a lot of things, i.e. there are a lot of things I believe that most people don't believe. I wanted to know if I was just a midwit being an idiot contrarian or if there's at least some reason to believe I might have a better idea about things than average people. In the end I scored very highly, so I can now feel more comfortable trusting my own judgement. If I had scored much lower, I would accept I'm probably wrong about a lot more things and stop having such strong opinions.