What is render used for?

I'm curious to know, what exactly is render used for? Could you please explain its purpose and functionality in a way that's easy to understand? I've heard it mentioned in the context of computer graphics and video editing, but I'm not entirely sure how it applies in those scenarios. Could you provide some examples or illustrations to help clarify its usage? I'm really interested in learning more about this topic and understanding its significance in the field of digital media.