Simulating the working/functional features of any design or machine under real-world conditions using CAD data. It helps to explain how a design or how a machine/product functions. CAD Animation eliminates language barrier as no text, narration required to your buyers/customers.
Almost all 3D CAD software like Solid Works, Auto Desk Inventor... has the “Animation” feature.
There is a saying Picture is worth of thousand words, so Animation is worth of thousand pictures.
Here is the one of Animation link.