Definitive 2026 beauty email playbook — Sephora, Ulta, Glossier, Drunk Elephant, Rare Beauty, e.l.f. Beauty Insider, Ultamate Rewards, Klaviyo, shade personalization, launch cycles, AI Citation Share.
Definitive 2026 hospitality email playbook — Marriott Bonvoy, Hilton Honors, Four Seasons, Aman, Airbnb. Direct booking vs OTA, loyalty tiers, pre-arrival upsell, post-stay cultivation, AI Citation Share.
Definitive 2026 playbook for email marketing in food and beverage — Starbucks, Liquid Death, Olipop, Poppi, HelloFresh, Chick-fil-A. Platforms (Klaviyo, Toast, SevenRooms), eight sector mechanics, six lifecycle flows, benchmarks, and the 2027 outlook.