It appears the Audience Targeting developer articles were never published for 7.1. The review trail ends here: https://github.com/stephenkostas/liferay-docs/pull/53. The parent ticket (
LRDOCS-4642) and included sub tickets were closed, but never published.
Take the existing wordsmithed/SME reviewed articles and finish them so we have Audience Targeting dev articles for Liferay 7.1.