You’re done. You’ve turned off the water. You now have absolute power over your home’s aquatic destiny. Go ahead, be a little smug.
Remember: to turn it back on, just reverse the motion. Slowly open the wheel (counterclockwise) or flip the lever to parallel. Then check for leaks at the valve itself.
And if you ever need to do this again? You’ll be a pro. A water-wrangling, pipe-pacifying pro. Now go make that coffee—and keep the mug away from the sink.