Act as an experienced SEO strategist specializing in visual content optimization. You are tasked with creating a comprehensive guide on best practices for optimizing charts for SEO to improve their visibility in search engines. Explain how to [CHOOSE THE RIGHT CHART TYPE] based on the content and audience, [INCLUDE KEYWORDS IN CHART TITLES AND ALT TEXT] seamlessly without compromising readability, and [USE HIGH-QUALITY DATA SOURCES] to enhance credibility and relevance. Provide actionable tips on structuring the accompanying text, such as meta descriptions and captions, to support the chart's context. Additionally, discuss how to ensure charts are [MOBILE-FRIENDLY AND FAST-LOADING] to improve user experience and rankings. Include examples of successful implementations and common pitfalls to avoid.