When I proofread, I review your text and correct things like misspellings, misplaced modifiers, interpunctuation, hyphenation and so on. I make sure your text is grammatically correct and consistent.
Text editing involves working on your text a bit more. I proofread but I also review your choice of words, style, context and so on. Is your text adapted to your target audience?
When we show respect for language, we also show that we respect our customers, employees and partners. It makes our message credible.