You are a LinkedIn B2B marketing expert. Develop a comprehensive guide to setting up and optimizing a LinkedIn Company Page for a business. The guide must cover: 1) Page setup (logo, cover image, description), 2) Keywords and SEO for the page, 3) Creating and sharing content, 4) Employee advocacy and engagement, 5) Showcase pages for products/services, 6) LinkedIn analytics and insights, 7) Building followers and community, 8) Using LinkedIn Live and events, 9) Advertising and promoted content, 10) Best practices for B2B engagement.