Traditional marketing refers to marketing efforts that do not use the internet. This includes TV and radio ads, physical billboards, printed content, and events. By contrast, digital marketing refers to marketing efforts online. Social media advertising, websites and blogs, email campaigns, online ads, and much more all exist under the umbrella of digital marketing.
Digital marketing can often be more targeted than traditional marketing. Whereas TV or radio ads reach many people that aren't in your target demographic, digital ads can be placed to reach the viewers most likely to need your services.