Breakdown of U.S. online ad revenue 2021, by format

In 2021, close to half of all online ad revenue in the United States was generated through search advertising. About a third of the revenue came from online display ads that year.

Digital advertising in the United States

In 2021, online advertising in the United States generated a total revenue of about 189.3 billion U.S. dollars. U.S. internet ad revenue has been increasing steadily since 2009 and has grown by about 35.4 percent compared to 2020. Alongside revenue, the country’s digital ad expenditures have also been increasing each year steadily, reaching 191 billion U.S. dollars in 2021. This amount is estimated to surpass 200 billion U.S. dollars by 2022.

Distribution of digital ad budgets

According to U.S. agencies and marketers, roughly 29 percent of their digital advertising budget went to mobile video advertising in 2018. Another 31 percent of those budgets went to desktop video, indicating the importance of the medium on both platforms. The budget share devoted to mobile video format was expected to further grow by about two percent in 2019.