Levels are used to determine which users can make me do what.
The most important use of the levels are:
userlevel >=  50 : user will be made channel operator by me
userlevel >= 100 : user may modify user/shit/prot lists
userlevel >= 125 : The user may use certain "special" commands.
userlevel >= 150 : user may use all my functions
shitlevel >=  50 : user won't be opped, and cannot modify
                 : the various list, regardless of the userlevel.
                 : I also will not allow this user to be opped by
                 : someone else
shitlevel >= 100 : user will be kicked and banned when the
                 : channel is joined
protlevel == 100 : I will not massdeop or masskick these users.
                 : if a user with level 100 is deopped, I will reop him/her
SEE ALSO: WHOAMI, WHOIS, NWHOIS, USERADD,
          SHITADD, PROTADD, getting_access