Use 'improve upon' when discussing revisions or enhancements in professional or creative settings. After the review, the team decided to improve upon the marketing strategy.
Pro Tip 2/3
Constructive Tone
The phrase often implies positive changes and is commonly used in constructive criticism. Your essay is good, but you can improve upon the introduction.
Pro Tip 3/3
Continuous Process
'Improve upon' suggests ongoing enhancement, not just a one-time change. The software is updated regularly to improve upon its features.