Magento is a versatile open-source platform widely used for building eCommerce websites, offering both a free version and a premium version with advanced features. It is particularly valued for its flexibility, scalability, and ability to integrate with various third-party applications. Magento supports a large community of developers, which aids in continuous development and troubleshooting. It is distinguished from other platforms like Shopify and WordPress by its greater customization potential, albeit requiring more technical expertise. Functional testing is crucial for Magento applications due to the complex nature of eCommerce systems, ensuring all components from payment processing to catalog management operate correctly. The Magento Functional Testing Framework (MFTF) and platforms like LambdaTest provide tools for both manual and automated testing, allowing developers to ensure their Magento-based websites are bug-free and optimized for various devices and browsers.