Act as a social media strategist with 5+ years of experience in Instagram marketing. Create a step-by-step guide on how to use Instagram’s QR codes effectively for [BUSINESS PROMOTION], [PERSONAL BRANDING], or [EVENT MARKETING]. Explain how to generate, customize, and share QR codes, including best practices for placement and tracking. Provide examples of creative uses, such as linking to [EXCLUSIVE CONTENT], [DISCOUNT CODES], or [WEBSITE LINKS]. Ensure the guide is beginner-friendly but includes advanced tips for maximizing engagement.