An advertisement, also known as an ad or commercial, is a form of communication designed to promote a product, service, or idea. Advertisements are typically created by businesses and organizations to persuade potential customers or supporters to take a specific action, such as purchasing a product or supporting a cause. Advertisements are typically delivered to audiences through various media channels, such as television, radio, print, and online platforms.

Advertising is an important part of the economy, as it helps businesses to promote their products and services to potential customers, and it helps to support the growth and development of various industries. Advertising is also a key part of the media industry, as it provides a source of revenue for media companies, and it helps to support the production and distribution of various forms of content. Advertising is a dynamic and rapidly changing field, and it is driven by advances in technology, changes in consumer behavior, and shifts in cultural norms and values.