What do the different degrees in sex offenders mean

Where do you find this?

Most states categories crimes as 1st, 2nd, third, etc. felonies, similarly several degrees of misdemeanors. So it depends on what state you are in.

It's sort of like the severity of the crime committed. Like there's degrees of murder, there are also degrees of sex offense. Someone who murdered out of self defense, or accident will have a different degree of murder than someone who planned a murder or did it out of rage.
If someone exposes themselves in public the degree of the offense is not going to be as bad as someone who raped another person.

They are normally ( in the US) state crimes and each state will have their own rules and names for different crimes.