Imagine you are flying a toy plane around a globe. If you want your plane to go around the Earth's North and South Pole, you would have to fly your toy plane in a very special way called a polar orbit.
It's like drawing a circle around a ball, but instead of going around the center of the ball, you are going around its top and bottom.
Now, let's pretend that plane is a satellite, and it's orbiting the Earth instead of just flying around a globe. A polar orbit is a special path that a satellite takes as it circles around the planet. When a satellite is in a polar orbit, it travels from the North Pole to the South Pole and back again, covering the entire Earth's surface.
This type of orbit is very useful for many things like monitoring weather patterns, terrain, and mapping the Earth's surface. Polar orbits can also study the polar regions where it is difficult to see from the ground.
So, just like flying a toy plane over the top and bottom of a globe, a polar orbit is a special type of path a satellite takes around the Earth to see and study different parts of our planet.