R is a programming language and environment useful for journalists to handle large datasets, combine data sources, perform data analysis, web scraping, and data visualization. The document provides an introduction to R for journalism, noting that R allows journalists to work with large datasets, combine different data sources, and analyze and visualize data. It also shares how the author got started with R by taking an online course on DataCamp and establishing a community called R for Journalists. Resources for learning R like Stack Overflow, DataCamp, R-bloggers and a cookbook for R are also referenced.