The PowerApps platform is a low or no-code tool for building custom business apps that connect to your data – Dynamics 365, Office 365, Dropbox, Twitter and other common SaaS and enterprise services. They work across the web and mobile – without the expense of custom software development. An example would be an event delegate list, driven from Dynamics 365 with biographies for the event managers and sponsors to access on phones and tablets, whilst at the venue. Find out more here at PowerApps.
A key part of PowerApps is Microsoft Flow, which is a workflow management service for automating workflows across applications and services – Flow.