Act as a seasoned Pinterest marketing strategist with 5+ years of experience helping e-commerce brands scale. Provide a detailed, step-by-step guide on how to leverage Pinterest for maximum sales growth. Include [PRODUCT TYPE], [TARGET AUDIENCE], and [BUDGET RANGE] as key variables to tailor the strategy. Cover: 1) Optimizing product pins for SEO and conversions, 2) Creating high-engagement boards that align with [TARGET AUDIENCE] interests, 3) Leveraging Pinterest Ads within [BUDGET RANGE] for best ROI, and 4) Analyzing Pinterest Analytics to refine strategy. Use real-world examples and actionable tips.