I am not the professional barista, my latte art is not the best yet, I will keep on learning~~
Latte art is a method of preparing coffee created by pouring steamed milk into a shot of espresso and resulting in a pattern or design on the surface of the resulting latte. It can also be created or embellished by simply "drawing" in the top layer of foam. Latte art is particularly difficult to create consistently, due to the demanding conditions required of both the espresso shot and milk.
There are two main types of latte art: free pouring (pattern created during the pour) and etching (using a tool to create a pattern after the pour). Free pouring is far more common in American cafés, and requires little additional time in preparing a drink.
The two most common forms of poured latte art are a heart shape and the "rosetta" or "rosette"
Etched patterns range from simple geometric shapes to complicated drawings, such as crosshatching, images of animals and flowers, and are generally performed with a coffee stirrer of some sort. Etched latte art typically has a shorter lifespan than free poured latte art as the foam dissolves into the latte more quickly.