Propriety in any form of communication always comes back to the audience. Since technical writing audiences tend to be more formal, the language used should reflect that. That’s why more effective technical writers reject from their writing many expressions commonly accepted in speech.
A good example is okay, often abbreviated OK or O.K. Typically, okay conveys approval or acceptance and appears as both a noun and a verb. In any case, more effective technical writers will replace okay with a more formal word to convey the desired meaning.
Consider the complete sentence in the cropped graphic above. Compare the feel of that sentence with the feel of this one.
Don’t be okay with okay in technical writing. More effective technical writing not only communicates your message better but also creates a more favorable impression of you and your brands in the minds of your audience.