Water on the inside floor of the refridgerator,

probably dust, hair, lint plugging the drains.
you have pets?
have it serviced by a professional, or you can disassemble all the drain lines and conduit and pans and clean yourself. good luck
call a PROFESSIONAL

Check door seal intact and sealing ok, clean rear compressor section of all dust/ dirt/ fluff and check drain hole on rear of fridge.as water should not pool inside but run away outside rear. Lift/ adjust door to make sure it closes properly.

Here is the basic idea on how to keep the refrigerator, air conditioner, or vacuum cleaner to work properly. Air is moved by an electric fan or blower in order for that product to work properly. If air movement is blocked the fridge won't get cold, the central air conditioner won't cool enough, the vacume cleaner won't clean as well. Check on your fridge's air movement by inspecting the bottom of the fridge for dust and cob webs. Remove the front bottom clip-on plastic grill. Or also even access the lower back of the fridge by removeing the screws holding up the heavy cardboard cover to see inside. Blockage of air flow will prevent a fridge from getting cold. Just like a vacume cleaner stops working when the bag is filled with dust and fibers.

The air could be blocked by the accumulation of dust and fibers. Look under your fridge if it is cloged, it will look just like the stuff on a dirty central air filter.

Dust and fiber buildup blocking the fridge's air movement from back to front (or visa-versa) of your fridge will slowly (years) prevent how good it cools. The build-up of dust and cobwebs prevents your fridge from cooling (more specifically prevents the heat to disapate from the metal heat disipating fins attached to the metal tubes to be blown off by the fans air). OK! Remedy for a vacuum cleaner REPLACE THE CLOGED VACUUM BAG.

Remedy for your fridge manually REMOVE THE CLOGING DUST AND FIBERS FROM UNDER YOUR FRIDGE. SORRY fridge manufacturers do not provide a dust filter like the vacume cleaner and central air systems manufacturers do. You have to figger out the best way you can clean it. Possibly vacuum with a crevice tool, or use a small brush than vacuum. The extreme would be unplug the fridge ( so you won't get electrocuted) bring a water hose into the kitchen and spray water at cobweb buildup at the bottom fridge, than wet vac the floor then wait 20 minutes to dry before pluging the fridge back into the electric outlet.
When you stand in front of your fridge and you hear the fridge electric motor turn on, the fan will blow air.The fridge

Here is the basic idea on how to keep the refrigerator, air conditioner, or vacuum cleaner to work properly. Air is moved by an electric fan or blower in order for that product to work properly. If air movement is blocked the fridge won't get cold, the central air conditioner won't cool enough, the vacume cleaner won't clean as well. Check on your fridge's air movement by inspecting the bottom of the fridge for dust and cob webs. Remove the front bottom clip-on plastic grill. Or also even access the lower back of the fridge by removeing the screws holding up the heavy cardboard cover to see inside. Blockage of air flow will prevent a fridge from getting cold. Just like a vacuum cleaner stops working when the bag is filled with dust and fibers. The air could be blocked by the accumulation of dust and fibers. Look under your fridge if it is cloged, it will look just like the stuff on a dirty central air filter.

Dust and fiber buildup blocking the fridge's air movement from back to front (or visa-versa) of your fridge will slowly (years) prevent how good it cools. The build-up of dust and cobwebs prevents your fridge from cooling (more specifically prevents the heat to disapate from the metal heat disipating fins attached to the metal tubes to be blown off by the fans air). OK! Remedy for a vacuum cleaner REPLACE THE CLOGED VACUUM BAG.

Remedy for your fridge manually REMOVE THE CLOGING DUST AND FIBERS FROM UNDER YOUR FRIDGE. SORRY fridge manufacturers do not provide a dust filter like the vacume cleaner and central air systems manufacturers do. You have to figger out the best way you can clean it. Possibly vacuum with a crevice tool, or use a small brush than vacuum. The extreme would be unplug the fridge ( so you won't get electrocuted) bring a water hose into the kitchen and spray water at cobweb buildup at the bottom fridge, than wet vac the floor then wait 20 minutes to dry before pluging the fridge back into the electric outlet.
When you stand in front of your fridge and you hear the fridge electric motor turn on, the fan will blow air out the bottom.The fridge

Here is the basic idea on how to keep the refrigerator, air conditioner, or vacuum cleaner to work properly. Air is moved by an electric fan or blower in order for that product to work properly. If air movement is blocked the fridge won't get cold, the central air conditioner won't cool enough, the vacume cleaner won't clean as well. Check on your fridge's air movement by inspecting the bottom of the fridge for dust and cob webs. Remove the front bottom clip-on plastic grill. Or also even access the lower back of the fridge by removeing the screws holding up the heavy cardboard cover to see inside. Blockage of air flow will prevent a fridge from getting cold. Just like a vacuum cleaner stops working when the bag is filled with dust and fibers. The air could be blocked by the accumulation of dust and fibers. Look under your fridge if it is cloged, it will look just like the stuff on a dirty central air filter.

Dust and fiber buildup blocking the fridge's air movement from back to front (or visa-versa) of your fridge will slowly (years) prevent how good it cools. The build-up of dust and cobwebs prevents your fridge from cooling (more specifically prevents the heat to disapate from the metal heat disipating fins attached to the metal tubes to be blown off by the fans air). OK! Remedy for a vacuum cleaner REPLACE THE CLOGED VACUUM BAG.

Remedy for your fridge manually REMOVE THE CLOGING DUST AND FIBERS FROM UNDER YOUR FRIDGE. SORRY fridge manufacturers do not provide a dust filter like the vacume cleaner and central air systems manufacturers do. You have to figger out the best way you can clean it. Possibly vacuum with a crevice tool, or use a small brush than vacuum. The extreme would be unplug the fridge ( so you won't get electrocuted) bring a water hose into the kitchen and spray water at cobweb buildup at the bottom fridge, than wet vac the floor then wait 20 minutes to dry before pluging the fridge back into the electric outlet.
When you stand in front of your fridge and you hear the fridge electric motor turn on, the fan will blow air.The fridge

Make sure there is no lint or dust in the fan motor located on the lower back of the fridge. If you clean the fan of lint and dust it should help evaporate water in drain pan.

Check behind the fridge where the compressor is and see if the condensor fan is working,also clean all the dust out of the fan area eg condensor. Hope this helps Kind Regards.

first defrost it by turning it off for 1\2 to 1 full day,put towels on the floor to catch the water,when a refridgerator gets frosted up it cant circulate the cold air,and if its one with the freezer on top then the cold air cant blow down into the refridgerator,check inside the refridgerator at the top where the thermostat cover is there will be a vent hole,it could have ice built up so much that its totally blocking the air flow.This usually happens when hot food is put in the refridgerator and causes steam,or the refridgerator runs too much caused by bad door seals,or the cooling fins on the back or bottom underneath plugged with dust and the freon gets too hot causing condensation inside the freezer which causes it to frost up,a plugged drain hole will back up water and freeze,the fan in the freezer may have stopped working,which is about a $60.00 part,and finally a bad defrost element (about a $40.00 part)which is a glass tube inside the freezer with a coiled up wire inside it that heats up at certain times to defrost any ice build up,(which is the last thing to check)

Check to see if the run-off tube at the back is plugged.

I dont know how old the fridge is - but if it a couple years old check at the back or the fridge - there should be a tube running down the back of the fridge down into the bottom tray. This tube funnels water from the freezer (condensation, or water from the defrost) down onto the tray holding the compressor where it evaporates with help from the heat off the compressor. Sometimes this tube can get plugged up with some scum or mineral deposits, causing the built up water to drain from inside the fridge.

The tube shouldn't be too hard to remove and clean out with some hot water and pipe cleaners. Had the same issue on on a GE fridge last year.
Hope this helps!