This book tells the story of complexity from a UX perspective. There are many stories worth pondering about what simplicity means, and design examples from various companies provide a glimpse into how to solve problems from a UX perspective.
One of the words most associated with good usability might be Simple. Oftentimes, simplicity is associated with products with only one button remaining on a product with nothing on it. However, users will feel uncomfortable if the interface is simple and they do not understand how to use the features.
When users use a product, there are many purposes they want to achieve. Simplicity does not just mean 'showing one by one without anything', but means a pattern in which only necessary things are placed so that users can understand. There are also processes where complexity cannot be eliminated, such as an airplane instrument panel. Ideally, the system would automatically process all the complex information related to the plane and only input the 'destination', but as complex as our lives are, the system cannot predict everything.
No matter how complex the concept is, no matter how well-organized the concept is, it can be difficult for first-time users to know how to use it because of the myriad of factors. What helps in this moment are social signifiers. I mean the traces that other people leave behind after experiencing them, and through these clues I can learn how to use this interface.
The review function provided by commerce services is also an example of a social signifier that allows you to find out which product is right for you among countless products.