Act as a TikTok marketing strategist with 5+ years of experience in helping brands grow their presence on the platform. Provide a step-by-step guide on how to optimize a TikTok profile for maximum brand growth. Include specific strategies for [profile picture selection], [bio optimization], and [content theme consistency]. Explain how to leverage trending sounds and hashtags like [TREND_NAME] to increase visibility. Also, detail the importance of [ENGAGEMENT_TACTICS] such as responding to comments and collaborating with influencers. Tailor the advice for [TARGET_AUDIENCE] and suggest metrics to track for success. Keep the tone professional yet engaging, and ensure the tips are actionable for brands of all sizes.