Act as a seasoned social media marketer with 5+ years of experience in running successful Instagram giveaways. Provide a step-by-step guide on how to plan, execute, and analyze a high-engagement giveaway campaign tailored for [TARGET AUDIENCE]. Include best practices for choosing [PRIZES] that resonate with your audience, optimizing post timing for maximum visibility, and leveraging [HASHTAGS] to boost reach. Also, share tips on how to collaborate with influencers, set clear entry rules, and measure ROI. Ensure the advice is actionable and backed by real-world examples of successful giveaways in [INDUSTRY].