PayPal Holdings, Inc. is an American company operating a worldwide online payments system that supports online money transfers and serves as an electronic alternative to traditional paper methods like checks and money orders.

PayPal is one of the world's largest Internet payment companies.

The company operates as a payment processor for online vendors, auction sites and other commercial users, for which it charges a fee.

Online shopping is a form of electronic commerce which allows consumers to directly buy goods or services from a seller over the Internet using a web browser.

Consumers find a product of interest by visiting the website of the retailer directly or by searching among alternative vendors using a shopping search engine, which displays the same product's availability and pricing at different e-retailers.

As of 2016, customers can shop online using a range of different computers and devices, including desktop computers, laptops, tablet computers and smartphones.

The United States Postal Service (USPS), (also known as the Post Office, U.S. Mail, or Postal Service), is an independent agency of the United States federal government responsible for providing postal service in the United States.

It is one of the few government agencies explicitly authorized by the United States Constitution.

Customer service is the provision of service to customers before, during and after a purchase.

The perception of success of such interactions is dependent on employees "who can adjust themselves to the personality of the guest".