It's pay to play marketing > reach out to people > whoever is interested will respond. Your business will be seen by a large number of people, but only some of them will be interested in responding. Of course, we strive to get as many of the people we reach as possible interested, not least by targeting our advertising campaigns correctly. Such marketing is necessarily useful, for example, when launching new products on the market.
Elements of outbound marketing are, for example, advertising campaigns on social networks, billboards, flyers, TV/radio ads, influencers, cold calls, email spam.