A hotel detective is like a superhero whose job is to make sure everyone is safe and happy when they stay at a hotel. They wear fancy clothes and keep a watchful eye on everything that's happening.
If someone is doing something naughty or making too much noise, the detective will politely ask them to stop. They also help make sure that everyone is following the rules, like not smoking in their room or stealing things.
Sometimes, bad guys try to sneak into hotels and do bad things. But the hotel detective is always ready to stop them and keep everyone safe. They also help solve mysteries, like finding lost items or figuring out who did something wrong.
In short, hotel detectives make sure everyone is following the rules and having a good time, just like a parent watching over their kids. Except instead of just one family, they do it for the whole hotel!