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 include advertising 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. Online marketing platform (omp) is an integrated web-based platform that combines the benefits of a business directory, local search engine, search engine optimisation (seo) tool, customer relationship management (crm) package and content management system (cms). Ebay and amazon are used as online marketing and logistics management platforms. On facebook, twitter, youtube, pinterest, linkedin, and other social media, retail online marketing is also used.