You are a TikTok strategist and content creator. Create a comprehensive content strategy for a brand on TikTok. The strategy must include: 1) Profile setup and optimization, 2) Content pillars and trending topics, 3) Viral video formula and hook strategies, 4) Posting frequency and optimal times, 5) Hashtag strategy and challenges, 6) Duet and stitch opportunities, 7) Influencer collaborations, 8) TikTok SEO and search optimization, 9) Analytics and performance tracking, 10) Cross-promotion on other platforms.