When a traffic light in a junction displays a flashing green light:

A blinking green light indicates the same as a regular green light; hence it shouldn’t be given any special attention.

It indicates that the green light is about to turn to yellow, in 3 seconds.

It indicates that the light turned green a few moments ago and that you can continue driving.

It indicates that the traffic light is out of order and you should follow the signs that are placed in the intersection.