In any kind of Technical Communication career, plain language is very important. Specifically, it’s important in technical writing as the purpose of technical writing is to make sure the reader/audience understands the information that is being communicated. If you haven’t communicated something effectively then there is a good chance the language was too technical or not correctly targeted toward your audience.
Plain language is the tool that allows someone to communicate a technical or complicated concept to a person who may not understand it as well. Basically, the whole foundation of effective technical writing is knowing how to use plain language to communicate a subject or concept. You don’t want to confuse readers by using technical jargon or abstruse terms. Communicating in plain language means the words, structure, and design are clear to the intended audience so they can find what they need and understand and use that information.