Don't compromise on clarity

What does clarity imply? What kind of text can be classified as clear? Clear text is always:

• Constructive: Clear copy doesn't tolerate confusion. If your copy is effortless and users know exactly what to do, you've reached the goal. If your users see the button label "Cancel" and aren't sure what happens after they click it (e.g., do they cancel all changes or just close the window?), your copy has some room for improvement.
• Contextual: Clear UX writing is exceptionally contextual and drives users to take action. For example, which button doesn't create any confusion and engages users to publish a photo/video to their feed — "Share" or "Submit"? Obviously, Submit is too ambiguous in this case.
• Concise: Review, cut, and review again until your copy is short but informative. In his book Don't Make Me Think, Steve Krug expertly articulates this idea — write like you're writing for a billboard. Imagine your users are driving at 128 kmph and can only catch a few words of copy.