The Social SDK can publish more advanced presence information to Discord that games without any Discord integration can publish. By doing this, games can also enable invites directly from Discord so that friends can quickly and easily join up.

To get started you'll first need to publish rich presence information, so see:

discordpp::Activity for the details on what rich presence is and what each field means
discordpp::Client::UpdateRichPresence for publishing a rich presence

After that, to get started with invites, see:

discordpp::Activity for what fields are required to make invites work
discordpp::Client::SendActivityInvite to invite others to your game
discordpp::Client::SendActivityJoinRequest to ask to join someone else's game
discordpp::Client::AcceptActivityInvite and discordpp::Client::SendActivityJoinRequestReply to accept an invite
discordpp::Client::SetActivityInviteCreatedCallback to know when you receive an activity invite and should show a notification