According to Dictionary Commerce is a division of trade or production which deals with the exchange of goods and services from producer to final consumer It comprises the trading of something of economic value such as goods, services, information, or money between two or more entities. Business-to-consumer (B2C) : Online transactions are made between businesses and individual consumers. E.g. Amazon.com, eBay.com. Business-to-business (B2B): Businesses make online transactions with other businesses. Set of practices and procedures employed by firms to monitor and regulate their marketing activities in achieving their marketing objectives are called marketing control. Marketing control is the process of monitoring the proposed plans as they proceed and adjusting where necessary. Definitions: “Marketing control is theprocess of taking steps to bring actual results and desired results closer together”. ----Phillip Kotler Online advertising, also called online marketing or Internet advertising, is a form of marketing and advertising which uses the Internet to deliver promotional marketing messages to consumers. It includes email marketing, search engine marketing (SEM), social media marketing, many types of display advertising (including web banner advertising), and mobile advertising. Like other advertising media, online advertising frequently involves both a publisher, who integrates advertisements into its online content, and an advertiser, who provides the advertisements to be displayed on the publisher's content. Other potential participants includeadvertising agencies who help generate and place the ad copy, an ad server which technologically delivers the ad and tracks statistics, and advertising affiliates who do independent promotional work for the advertiser.