Flow Designer is a feature of the Now Platform that enables process owners to automate work without having to code. It allows users to create multi-step flows from reusable components and integrates with other applications. Users can build flows to automate business processes, subflows to reuse sequences of actions, actions to automate sequential steps, and spokes to automate integrations. The feature also provides user access and feature access configuration, as well as maintenance and execution details. Additionally, users can visit the ServiceNow Store website to view available apps and submit requests for new ones.