Rendering is the process of turning a 3D scene into a 2D image. Blender includes three render engines with different strengths:

• Cycles: A physically-based renderer that can produce highly realistic images. It offers advanced features such as ray-traced reflections, refractions, and volumetrics. Cycles is ideal for creating photorealistic images and animations, but rendering times can be slower compared to Eevee.
• Workbench: The default viewport render engine. It provides a quick and simple way to preview the scene while working. It doesn't offer advanced lighting features or realistic materials, making it best suited for fast playblasts or previews.
• Eevee: A real-time renderer that provides fast and interactive rendering results. It is ideal for creating stylized or cartoonish animations, as it offers advanced features such as volumetrics and screen-space reflections. However, it may not provide the same level of realism as Cycles.