Builder design pattern is a creational design pattern. We can use Builder pattern to create complex objects with multiple options.
E.g. when we have to create a Meal in a restaurant we can use Builder pattern. We can keep adding options like- Starter, Drink, Main Course, and Dessert etc. to create complete meal. When a user selects other options of Starter, Drink Main Course, Dessert another type of meal is created.
Main feature of Builder pattern is step-by-step building of a complex object with multiple options.Read the full book at www.amazon.com