A more thorough explanation:

The plain-language movement is a group of people who want legal and business writers to write in a way that is easy to understand. They want writers to use simple words and sentences that are accurate and precise. This movement is also known as the plain-English movement.

For example, instead of writing "pursuant to the terms and conditions of the agreement," a writer in the plain-language movement would write "according to the agreement."

The goal of the plain-language movement is to make information more accessible to everyone, regardless of their education level or background. By using plain language, writers can help ensure that their message is understood by a wider audience.