I WONDER - Why Do Skunks Attack With Spray?

The video explains how nocturnal animals like skunks and meerkats have different predators and defense mechanisms. Meerkats, active during the day, are preyed upon by birds and use lookouts for protection. Skunks, active at night, face ground attackers and use their spray as a defense mechanism.

What is the significance of the time of day in the predation patterns of different animals mentioned?

In what way is the spray of skunks beneficial to them during an attack?