Gatsby is an open-source framework for building static websites and web applications. It uses React and GraphQL to create fast, optimized, and scalable websites. Gatsby allows developers to build static pages and integrate dynamic content, all while ensuring high performance, better SEO, and improved user experience. It's widely adopted for building modern websites, blogs, and e-commerce sites.

Features of Gatsby:

• Uses React for building user interfaces, allowing developers to build reusable components.
• Built-in data fetching using GraphQL, enabling integration of data from various sources like CMS, APIs, and databases.
• Automatic performance optimization, including code splitting, image optimization, and preloading critical assets.
• Static site generation, which ensures that pages are pre-built for faster page loads and better SEO.
• Wide plugin ecosystem, providing easy integration with various data sources, third-party services, and deployment options.
• Cross-platform support, including Linux, macOS, and Windows, making it versatile for various development environments.

To check Gatsby version, run: $ gatsby --version

Disclaimer: Gatsby is an open-source project distributed under the MIT License. While it is reliable for most use cases, users should validate its performance and compatibility for critical applications. Ensure that all configurations and dependencies are properly set up for optimal functionality.