Skeuomorphism
Skeuomorphism design style is a design that mimics the real-world elements in the design interface. They are used to give users a sense of familiarity. They use images and effects that users usually see around them. Using these real-world makes interfaces easier to understand for the users. This builds an emotional connection with users which makes it easier for users to engage with the interface. This increases user engagement by a lot which helps the interface gain more popularity.