If you're using ChatGPT for content, feed it your client's past 5-10 posts first.
Then tell it to "match this voice exactly" before you ask it to write anything new. the difference in output quality is significant instead of generic content that sounds like everyone else you get something that actually sounds like your client. I do this as standard for every content client now, takes maybe 2 extra minutes at the start and saves way more than that in editing time after. the more examples you feed it the better it calibrates 5 posts is the minimum, 10 is the sweet spot. if your client has a newsletter or blog those work even better than social posts because the writing is usually more developed. one of those small process tweaks that makes everything downstream easier.