American e-commerce platforms have several important characteristics:

Amazon is the only dominant platform. Its traffic accounts for 54%, which means that the traffic of all other e-commerce platforms combined cannot match it.

Many e-commerce platforms are backed by department stores. Five of the top ten platforms mentioned above are large department stores in the United States.

Female consumers are very important. It can be seen that many e-commerce platforms directly target women, such as Kohl's and Target.

A unique business model can occupy a place. For example, Wish's products focus on low prices and waterfall-style product recommendations, while Etty focuses on handicrafts, which can be said to have formed differentiated competition with other e-commerce platforms.