A-Frame is an open-source web framework designed for building virtual reality (VR) experiences using HTML. It simplifies the process of creating 3D environments by allowing developers to use familiar web technologies like HTML, CSS, and JavaScript. This makes it accessible for both experienced developers and those new to VR. With A-Frame, users can create immersive experiences that work across various devices, including desktop computers, mobile phones, and VR headsets. The framework supports a wide range of components and features, enabling the integration of 3D models, animations, and interactive elements to enhance user engagement in virtual spaces.