Digital marketing refers to the use of digital channels and technologies to reach and engage with customers. Some examples of digital marketing channels include:

1. Websites: A company's website is a central hub for all of its digital marketing efforts.

2. Email: Email is a direct and personalized way to reach customers and can be an effective part of a digital marketing campaign.

3. Social media: Companies can use social media platforms like Facebook, Twitter, and Instagram to connect with and engage their target audience.

4. Pay-per-click (PPC) advertising: PPC advertising allows companies to place ads on search engines and other websites and pay only when a user clicks on the ad.

5. Content marketing: Content marketing involves creating and sharing valuable, relevant content to attract and retain a clearly defined audience.

6. Influencer marketing: This involves partnering with influencers, or individuals with a large following on social media, to promote a company's products or services.

The goal of digital marketing is to reach customers where they are spending their time, which is increasingly online. By using a combination of these tactics, companies can effectively promote their products or services and build relationships with customers.