Ultrasonic impact treatment is a fancy way of saying that someone is using a special tool to hit something really really fast. The tool makes tiny vibrations that are so fast you can't even see them.
When we hit something with the tool, the vibrations help shake all the little pieces inside the thing being hit. This can make the thing stronger and tougher.
It's kind of like when we shake up a bottle of juice. The juice gets all mixed around and it becomes harder to knock over. The tool does that to metal parts so they don't break as easily when we use them.
Overall, ultrasonic impact treatment helps make things stronger and last longer, so we don't have to replace them as often.