Advertising her business, no doubt.
https://www.theguardian.com/film/2021/may/10/dear-gwyneth-paltrow-welcome-to-everyone-elses-sad-potato-lifeShe's skillful at that. All that vagina stuff too is just clever marketing as she has admitted herself in a more candid moment.
Her last leading acting role was 15 years ago (in actually a very good movie where her role was unglamorously that of a gifted person doubting her sanity).
She said good-bye to Hollywood before Hollywood said good-bye to her and she would find herself - like all aging actresses - fighting for (and eventually no longer getting) female lead roles with people 10-15 years younger than her as competition. Instead she put her fame to good use and established GOOP which
- enduringly successful sells
- products that nobody really needs
- and that are not really original either
- at inflated prices.
Gwyneth ain't dumb or naive and has real commercial nous. And she didn't have to go to bed with Harvey Weinstein or live off Chris Martin's Coldplay royalties to become this wealthy.