You can configure several timers that will send messages at regular interval. These messages will be sent by the bot every X minutes. You can for example make the bot sent some sponsoring information every 5 minutes.
You can use emojis in the chat using ":shortname:". The short name can start and/or end by a colon (:), and only contain alphanumerical characters, underscores and hyphens. It is strongly recommended to start them by a colon, so that users can use autocompletion (by typing ":" then press TAB).