What does WATER PATCHES mean regarding the reported runway condition?

Question

Question PPL(A) - Private Pilot License - Air Law

QuizVDS · Accepted Answer

Patches of standing water are visible

QuizVDS · Answer

A large part of the surface is flooded

QuizVDS · Answer

Wet surface, but no significant patches are visible

QuizVDS · Answer

The runway is clear of water, ice, and snow

PPL(A) EN - Id 69 - What does "WATER PATCHES" mean regarding the reported runway condition?