Online advertising is a form of marketing and advertising which uses the Internet to deliver promotional 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.
Online advertising has become increasingly important as more and more people use the Internet to find information, shop, and connect with others. It allows businesses to reach a large and targeted audience with their marketing messages, and it can be a very effective way to generate leads and sales.