system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why the Moon is covered in craters, but not the earth? Do we get hit by big meteors very often?
gpt
The Moon has little atmosphere and no geologic activity.  The vast majority of impacts on the Moon were very early in the Moon's life, since the early Solar System had *a lot* more crap flying around, and most of that crap that ever *will* collide with the Earth or Moon already has. 

Same deal with the Earth.  It's covered in craters.  However, we have all this geologic activity, forestation, wind, erosion, etc. and after billions of years the craters kind of get flattened out.  On the Moon, they basically stay forever since it doesn't have any of these things.