My marketing team is largely using it for:
1. Researching topics - it's a lot faster than Googling
2. Rephrasing content - it's great for folks in the team who's English is not their native language, so this helps them rephrase boring facts and awkward phrasing into more engaging sentences.
We still have a final review process by other members of the team to ensure that the writing is fact-checked (sometimes the AI is wrong), and insert our opinions to bring in fresh perspectives.
UI-licious