An idea is following: you add a bot to the chat, it starts collecting word frequency statistics from messages and then it will be able to generate list of topics that were discussed. Just imagine, you open Telegram, see 1000+ unread messages at some chat, but you don't want to read it all. Then you just use command /topics and see what has been discussed today.
/startbot description/topicschat topics/statisticschat statistics/addadd new topic/world_topicsTelegram topics/cancelcancel previous action/settingssettings/helplist of commands/rateto rate bot/rankflood rank/donatehelp to the project