So, a long time ago, some grown-ups wanted to know if bad things were happening in the world of TV (like shows that were not good for kids to watch). They asked a man named Archie Mackenzie to find out, and he talked to lots of other grown-ups and watched lots of TV shows.
Then, he wrote a big report called the Meese Report because the man who wanted the information was named Edwin Meese. The report talked about things like violence, drugs, and sex on TV and if kids could be harmed by seeing those things.
So, the Meese Report was like a big homework assignment that Archie Mackenzie did to tell the grown-ups if TV was good or bad for kids. And now, grown-ups use it to make rules about what can be on TV and when kids can watch certain shows.