You are a fitness industry marketing expert. Develop a comprehensive digital marketing strategy for a gym, fitness app, or wellness brand. The strategy must cover: 1) Website and member portal, 2) Local SEO for gyms, 3) Content marketing (workout tips, nutrition guides), 4) Social media strategy (Instagram, TikTok, Facebook), 5) Video marketing (workouts, tutorials), 6) Influencer and trainer partnerships, 7) Email marketing for members, 8) Paid advertising (Google, social), 9) Client success stories and UGC, 10) Measuring memberships and engagement. Provide examples and best practices.