This document provides information about plain language and its importance for accessibility and usability of information. It defines plain language as writing that allows users to find what they need, understand what they find, and use the information to meet their goals. The document notes that plain language supports people with different levels of literacy, cognitive disabilities, and visual disabilities. It discusses guidelines for writing in plain language, including writing for the audience, organizing information logically, writing for action, keeping text short, and designing for reading.