if you want to determine if two floats are approximately equal, you need a standard way to say, “okay this is close enough”
`if(FMath::Abs(float1 - float2) < KINDA_SMALL_NUMBER)
KINDA_SMALL_NUMBER is equal to (1.e-4f) (0.00001)
and so this is the standardized way of saying “okay yes, the difference between these numbers is small enough to consider them equal”
It has other uses as well ofc but this is one important case
Rama