Out of the box, Process Builder has limited support for Chatter. It can make simple posts or be fired when a new post is created but there’s no support for Groups, Group Members, Files, or Topics… until now. Introducing Chatter Bot, a set of custom objects and triggers that enables new capabilities for Process Builder so you can automate #nocode business solutions like creating cases when certain topics are assigned to conversations, or post welcome messages to users when they join a group, or notify file followers when a new revision is uploaded. Take Chatter collaboration to new levels at your company with Chatter Bot! Based on my GitHub projects blogged about at https://douglascayers.com/tag/chatter-bot/