This document provides an introduction to Shiny, an R-based web application framework for creating interactive visualizations. Shiny apps are coded using ui.R and server.R text files, which define the user interface and server logic respectively. The apps can then be run locally or hosted on RStudio's Shiny Server. Examples are given of interactive features like sliders and plots that can be built with Shiny. Hosting options through RStudio's beta Shiny Server are also briefly outlined.