IRC is a chat protocol. tilde.chat is our network.
See wikipedia for more info on the protocol.
SASL
Enabling SASL will allow you to avoid having to identify with NickServ everytime you login. Instructions for configuring it with weechat (the default client configured on tilde.team) can be found in the libera.chat docs.
Certificate login
If SASL does work you can also use a client certificate to authenticate automatically.