Act as a TikTok marketing strategist with 5+ years of experience in social media growth. Create a detailed guide on how to leverage captions effectively to boost engagement on TikTok. Include best practices for [CAPTION LENGTH], [HASHTAG STRATEGY], and [CALL-TO-ACTION PHRASES]. Explain how to tailor captions for [TARGET AUDIENCE] and align them with [TRENDING TOPICS] to maximize visibility. Provide examples of high-performing captions and analyze why they work. Also, address common mistakes to avoid, such as [OVERUSED PHRASES] or [MISMATCHED TONE]. The guide should be actionable, data-driven, and easy to implement for creators of all levels.