The shiny package is an R package that makes it easy to build interactive web apps straight from R. It allows you to convert your R code into a web app that can be accessed by anyone with a web browser.
Some key features of Shiny include:

Dynamic user interfaces - the UI can change based on user input
Reactive programming - outputs reactively update whenever inputs change
Interactive visualizations - creates charts, graphs, maps, etc. that users can interact with
Ability to use R Markdown to create HTML pages with Shiny widgets
Easy to publish apps online
And more!

Shiny is a great way for R users to quickly create interactive data dashboards and applications without needing extensive web development knowledge. It allows you to turn analyses and visualizations in R into web apps that can be used by people who don't know R.
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