Substack offers a platform that enables writers to publish and monetize subscription-based newsletters. The company provides tools for content creation, email distribution, subscription management, and audience analytics. Writers retain ownership of their work and can set their own subscription prices, while readers receive content directly in their inboxes. Substack also supports podcasting and discussion threads, expanding its services beyond traditional text-based publishing. The platform is used by journalists, authors, and creators who seek a direct relationship with their audience without relying on traditional media channels. Through its ecosystem, Substack facilitates independent publishing and helps writers build sustainable businesses around their content.