The animations in the Web Design are going to be part of a feature to improve UX.
Google tries to standardise the way to design Applications with the remarkable Material Design.
The goal of this standardisation is to focus on the main goal of the animation “educate, engage and delight”.
As a starting point, I will try to introduce you the animation with the motion.
Newton introduces its “Laws of Motion” to describe the movement of a body.
These laws describe the relationship between forces applied to a body and the deviation of the speed during the time.