greetings

The formula shown is in B5, dragged down to B10. It refers to values in
A5:A10. Could someone explain in ordinary English how I should interpret
what it is doing:

I'm particularly unsure how to interpret:
a) why the criteria for the Countif is itself a range. What does that
mean?
b) when does the logical test of the If statement return TRUE?

{=If(A5<A$5:A$10, 1/Countif(A$5:A$10, A$5:A$10))}


Sample output

A B A B
4 FALSE 3 FALSE
0 1 0 0.333333
3 1 3 FALSE
1 0.333333
8 FALSE 8 FALSE
3 1 3 FALSE

confused
anny