Act as a seasoned SEO content writer with 5+ years of experience in digital marketing. Craft a comprehensive 1,200-word blog post titled '[How Social Signals Impact SEO in 2024]' targeting [small business owners] and [marketing professionals]. The post should cover: 1) Definition and examples of social signals (likes, shares, comments), 2) Their direct/indirect effects on [search engine rankings], 3) Case studies of brands that improved SEO through social engagement, and 4) Actionable strategies to leverage [platforms like Twitter, LinkedIn, and Facebook] for SEO benefits. Use a conversational tone, include 3-5 statistics from authoritative sources, and structure with H2/H3 headings for readability. Conclude with a CTA encouraging readers to audit their social media presence.