Digital marketing is the use of electronic media (such as the internet, email, and social media) to advertise products and services. It is used by businesses of all sizes to reach and engage with their customers, and to promote their products and services. Some common examples of digital marketing include:

1. Search engine optimization (SEO): This refers to the practice of optimizing a website to rank higher in search engine results pages (SERPs).

2. Pay-per-click advertising (PPC): This is a form of online advertising where businesses pay a fee each time one of their ads is clicked.

3. Social media marketing: This involves the use of social media platforms (such as Facebook, Instagram, and Twitter) to promote a business and its products or services.

4. Email marketing: This involves sending marketing messages to a group of people via email.

5. Content marketing: This involves creating and distributing valuable, relevant, and consistent content to attract and retain a clearly defined audience, and ultimately, to drive profitable customer action.

6. Mobile marketing: This involves using mobile devices (such as smartphones and tablets) to promote a business and its products or services.

7. Video marketing: This involves using video to promote a business and its products or services.

Digital marketing is used by businesses to reach customers where they are spending their time: online. It allows businesses to target specific demographics and personalize their marketing efforts, which can be more cost-effective than traditional marketing methods.