Leaky Faucet on Toilet

The small faucet (on/off water?) that connects to the commode has a slow drip. Suggestions on a repair?

You need to determine where exactly on the stop (that is what it is called) the leak is. If it is where the stop connects to the copper pipe and it is a compression stop you may only need to tighten the compression nut. If the leak is where the stem, that is attached to the handle, enters the valve there is a nut there also. You would shutoff the water to the house and open a faucet until the pressure stops. Then turn the nut counter clock wise 3/4 of a turn then turn clockwise 1 full turn. Turn the water back on and check and see if the stop is still leaking. If it is try tightening a little more.