Act as a seasoned Instagram content strategist with 5+ years of experience in leveraging Instagram features for audience engagement. Explain step-by-step how to effectively use Instagram’s chat sticker to boost interaction in Stories. Include [specific examples of industries or niches] where this feature works best, such as [fitness coaches, fashion brands, or local businesses]. Highlight [common mistakes to avoid] when using the chat sticker, such as unclear CTAs or overuse. Provide tips on how to create compelling prompts that encourage followers to join the chat. Finally, suggest [metrics to track] to measure the success of your chat sticker campaigns, such as response rates or follower growth.