Summarize this article in one sentence.
Wearing fins will amplify your movements and let you move forward quickly without a lot of disruptive splashing. Keep your legs fairly close together. Keep your fin stroke movements smooth and relaxed. Try to move from the hip to make use of your thigh muscles and avoid kicking with your knees, as this will only waste your energy. The right snorkeling technique to power yourself forward with the downward strokes. Try to avoid splashing, as this will scare off the fish and can be annoying to other swimmers around you. Snorkeling is best done on gentle waters, but even there you should learn to adjust your movements to the up and down surging of the waves. Snorkeling is not a race, and a good session can last for hours.

Summary:
Use fins on your feet. Hold your arms at your sides to reduce drag and extend your legs so that the fins are pointed behind you. With your knees slightly bent, kick slowly and powerfully with the fins. Kick farther down and less upwards whilst arching your back upward. Keep your fins below the water when kicking. Float with the waves. Swim at a steady comfortable pace to conserve your energy.