In the Kutz (2016) textbook, there are descriptions of five types of applications of Web 2.0. Pick any two types and find two URLs that represent them. Please briefly describe each and explain how the

In the Kutz (2016) textbook, there are descriptions of five types of applications of Web 2.0. Pick any two types and find two URLs that represent them. Please briefly describe each and explain how they promote e-commerce.