**Next.js Introduces Incremental Static Generation (ISG) for Faster and More Scalable Web Apps**

Incremental Static Generation (ISG), a feature in Next.js, allows developers to pre-render pages at build time while updating them incrementally in real-time. This hybrid approach combines the performance benefits of static generation with the flexibility of server-rendered pages.

Key features of ISG include:

* Pre-rendering pages at build time
* Updating pages incrementally based on a specified revalidation period
* Improving performance and scalability for web applications
* Ensuring content freshness, SEO optimization, and dynamic flexibility

When to use ISG: Consider implementing ISG in projects with frequently updated content, such as blogs, e-commerce sites, documentation portals, or content-heavy sites.

Best practices include choosing an appropriate revalidate interval, using ISG selectively, and monitoring revalidation usage to avoid unnecessary server load.

**Key Takeaway:** Incremental Static Generation (ISG) in Next.js offers a flexible and scalable solution for building fast, SEO-friendly web applications with frequently updated content.

Source: https://dev.to/remejuan/understanding-incremental-static-generation-in-nextjs-a-practical-guide-11ff