Online advertising, also called online marketing or internet advertising or web 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.

Online advertising, also called online marketing or internet advertising or web 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.