What are the psychological factors behind e-commerce? Consider the point of

What are the psychological factors behind e-commerce? Consider the point of view of the consumer as well as the seller.
To what extent are social and behavioral health theories at play when you shop online?
How do advertising and marketing practices tap into human behavior, motivation, and needs? Provide examples and describe the strategies that are most successful.
Which advertising and marketing strategies are not as persuasive? Are these strategies ethical? Why or why not