Act as a seasoned SEO content strategist with 5+ years of experience in viral marketing. Craft a detailed guide on optimizing memes for search engines, covering: 1) How to research and incorporate [TRENDING KEYWORDS] into meme captions without sacrificing humor, 2) Best practices for [ALT TEXT] that balances accessibility and SEO, and 3) Technical considerations like [IMAGE FILE SIZE] and format (JPEG vs. PNG) for faster loading. Include specific examples of meme formats (e.g., reaction images, infographic memes) that perform well in [TARGET INDUSTRY]. Provide a checklist for meme SEO optimization and explain how to track meme performance using analytics tools.