Basically, everything above a range of 50km is smart ammunition of either 155mm artillery and larger shells or rocket artillery. Both aren’t just bombs that you fire and then drop out of the sky. They are actually small computers with an array of sensors and steering capabilities.
Rudamentally similar to a car’s GPS such ammunition knows where it is during flight and can just extrapolate its flight path based on physics formulas. Then it uses fins, gimbal or similar methods to adjust its path to steer it to the GPS coordinates uploaded. The newest ones have an accuracy of feet not hundreds of feet.
Relevant (https://www.youtube.com/watch?v=bZe5J8SVCYQ) on how rockets know their position.
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