Zapier is workflow automation software that allows users to create automated workflows called Zaps, which can send information from one app to another without coding knowledge. Zapier offers templates for new users and provides a user-friendly interface to combine user interfaces, data tables, and logic with thousands of apps. To set up a Zap, users need to create a Calendly trigger that sends an invitation created event, connect their Calendly account, customize the trigger, test it, then set up a Zoom action to create a meeting at the scheduled start time, customize the Zoom action, test it, and finally use the Zap. The resulting workflow can be used to automatically add Zoom information to Calendly invites, making scheduling meetings easier and more efficient.