Its probably a plugged up drain tube in the freezer area.

Every day, several times a day your refrigerator goes through a defrost cycle. A heater comes on in the freezer and defrosts the evaporator coils behind the rear wall of the freezer. Any and all frost that accumulates on the coils is melted and drips to the bottom of the freezer area under the coils. Into a drain pan. The water then goes though to the refrig fresh food area and out the back of the fridge, down a drain line to the drain pan (under the fridge).

Somewhere in the drain line or in the drain in the freezer, there is a blockage. That is causing water to back up and drip where you see it dripping from.

You will need to make sure the drain line is clear and maybe defrost the drain under the coils in the back of the freezer. You will need to remove the rear wall of the freezer to get to the drain, so be careful. Make sure you unplug the refrig's power cord before you work on it.