The majority of animated explainer videos today have a flat, two- dimensional appearance. This 2D technique works actually well for streamlining ideas or processes. But. in many cases, it's critical to add a third dimension: depth.
It can be tough to tell the difference between 2D animation and 3D animation. If you actually want to get technical, it's the distinction between drawing 2D illustrations and creating 3D models. The average viewer does not care about all of that. They just know that 3D seems more advanced and visually richer.
See more here: https://www.youtube.com/watch?v=M6TtmJ_S9XM