Next.js is a React framework commonly used for websites, ecommerce storefronts, SaaS applications, dashboards, and other web applications that require modern rendering and routing capabilities.

Next.js can support server-side rendering, static generation, optimized images, flexible routing, and modern React development, making it suitable for performance-focused websites.

Yes. Next.js can work with headless CMS platforms such as Sanity, Strapi, Storyblok, Contentful, and others through APIs or dedicated integrations.

Yes. Next.js is commonly used to build custom ecommerce storefronts and can connect with commerce platforms such as Shopify, Medusa.js, and other API-driven systems.

The cost depends on project scope, design requirements, integrations, backend complexity, and ongoing support. A simple marketing website will generally require considerably less development work than a custom SaaS or ecommerce platform.