The jump stop, and how it gives you two pivot feet
Footwork
A step by step walkthrough of landing on both feet at once, why it prevents travelling calls, and the common error.
Catch the ball while running and you have a problem: your feet are going to land one after the other, and the first one down becomes your pivot foot. That is fine until you want to pivot the other way, at which point you lift it, and that is a travel. The jump stop removes the problem by landing both feet simultaneously, which leaves you free to choose either foot as the pivot.
Start without a ball. Jog four steps, then on the fourth, hop forward off that one foot and land with both feet hitting the floor at the same instant, roughly shoulder width apart, knees bent, weight back on your heels slightly so you do not drift forward. The hop should be low and flat. If you are jumping upward, you will land late and off balance.
Now add the ball. Have someone pass to you as you approach the spot. Catch the ball in the air, during the hop, not before and not after. Catching before the hop means you have already started a dribble sequence in your head; catching after means you land and then reach, which breaks your balance forward.
On landing, the ball should be at chest height with both elbows out, not down by your hip. From here you can pivot on either foot, pass to either side, or go straight up into a shot. That last one is the point. A jump stop under the basket turns a messy drive into a balanced two-foot finish that can go up off either shoulder.
The most common error is landing heel to toe, where one foot touches a fraction before the other. It is hard to feel and easy to hear: a jump stop makes a single sound. If you hear two, you landed staggered and you only have one pivot foot. Practise on a wooden floor and listen.
The second error is stopping with the feet too close together. You will be stable front to back and useless side to side, and the first defender who bumps you will knock you off the spot. Think about landing wide rather than landing hard.
Where it matters most is in traffic. Driving into three bodies, a one-two step leaves you committed to a direction. A jump stop leaves you planted, legal, and able to go either way, and it is the fastest piece of footwork an adult beginner can add to their game.