What Application is
Used interchangeably with program and software, this is a general term for a program that performs specific tasks, such as word processing, database management, e-mail sending or retrieval, or Web browsing. Unlike system software, which maintains and organizes the computer system (such as the operating system), an app is an end-user program.
The meaning of Affiliate marketing
A revenue sharing arrangement between online advertisers or e-commerce merchants and online publishers or Web site owners, whereby payment is based on performance measures, such as the number of sales, clicks, or registrations that the affiliate refers. In other words, two companies agree to link to one another; if someone clicks from site A to buy something at site B, site A gets a commission on the sale. Affiliate software provides the tracking and reporting of commission-based activities (the sales, clicks, or registrations). Amazon.com pioneered affiliate marketing by getting as many other Web sites as possible to join its affiliate network and sell its products, thereby greatly extending its marketing reach.