ChanServ, on many IRC networks, is an IRC service which maintains channel registration and access information. If a channel is registered with ChanServ, its owners (and those they have designated) can use ChanServ to obtain control over the channel, gaining channel operator privileges. Most channel service bots also allow other sorts of channel management options, such as topic locks (in addition to +t), mode locks, and providing users automatically with operator status, half-operator status, voice, or other access, as designated by the channel owners. They may also provide some form of automated ban-list management.
There are several implementations of IRC services which have a ChanServ bot; some other services use other names, such as CS. The exact commands and features available depend on the service implementation and the network in question.
Read more about this topic: Internet Relay Chat Services