Despite these two terms often being used interchangeably, they actually refer to two different services.

Editing

Your text will be carefully checked against the source text for terminology errors, inaccuracies and inconsistencies. I will make proactive suggestions for changes that can improve the overall quality of the target text. Fluency and readability will be improved, ensuring a natural flow of the language, a cultural appropriateness and maximum impact on the target audience.

Proofreading

Your text is already terminologically correct and culturally appropriate, it has a good flow and style, but it needs to be checked for grammar, spelling, punctuation, typing and formatting mistakes and inconsistencies. It's a lighter review to ensure a publication-ready document.