The 'E' for Experience was added in late 2022 to reward first-hand experience with the subject — a review written by someone who actually used the product, a guide written by someone who actually did the work. AI-generated commodity content lacks Experience by design, which is part of why E-E-A-T matters more in the AI Overview era.
Practical E-E-A-T signals: visible named authors with credentials and bios, explicit dates published and last updated, citations to primary sources, transparent ownership and contact information, and unique data or perspectives not available elsewhere.
E-E-A-T is most heavily weighted on YMYL (Your Money or Your Life) topics — health, finance, legal, safety — but applies in some form to every query. The investment to surface real authorship and real expertise is one of the highest-leverage SEO moves available right now.