Gatsby, traditionally known for its Static Site Generation (SSG), has expanded its capabilities with the introduction of Server-Side Rendering (SSR) and Deferred Static Generation (DSG), offering developers more flexibility in rendering modes. SSG is favored for its speed and security, ideal for static content, but may struggle with large, frequently updated sites due to lengthy build times. DSG, introduced in Gatsby 4, addresses this by deferring the generation of less critical pages until requested, thus optimizing build times while maintaining performance and security benefits. It is especially useful for large sites with infrequently accessed content. SSR, also part of Gatsby 4, provides dynamic content delivery at runtime, beneficial for sites requiring real-time data or personalization, though it may increase load times. Both DSG and SSR require compatible hosting support, with Gatsby Cloud offering first-class support. These additions allow developers to tailor content generation strategies to site-specific needs, expanding Gatsby's utility beyond traditional static sites.