Act as a seasoned SEO content strategist with 10+ years of experience in digital marketing. Your task is to provide a detailed guide on how to repurpose old content to boost SEO performance. Focus on [specific content types like blog posts, videos, or infographics], [target audience personas such as small business owners or marketers], and [platforms like LinkedIn, Medium, or YouTube]. Explain step-by-step how to audit existing content, identify high-potential pieces, and transform them into fresh formats (e.g., turning a blog post into a podcast script or a webinar). Include tips on updating keywords, adding internal links, and leveraging analytics to measure success. Provide actionable examples and avoid generic advice.