Paid advertising has long been considered a popular customer-outreach method because, well, it works. In general, paid ads expose more people to your brand and help generate demonstrable business growth. Accessible metrics give fast results, costs are easy to measure, return on investment is easy to track, and campaigns are controllable and optimizable. U.S. advertisers understand this; it’s why they spent more than $190 billion on digital ads in 2021, according to Statista.