There are many digital marketing courses available online that you can take to learn about this field. Some courses focus on specific aspects of digital marketing, such as search engine optimization (SEO), social media marketing, email marketing, and pay-per-click (PPC) advertising. Others offer a more comprehensive overview of the field and cover a wide range of topics.

Here are a few things to consider when looking for a digital marketing course:

1. Accreditation: Look for courses that are accredited by a reputable organization, as this can give you confidence in the quality of the material being taught.

2. Instructor: Check out the instructor's background and experience to make sure they are qualified to teach the course.

3. Curriculum: Look for a course that covers the topics you are most interested in learning about and that provides a good balance of theory and practical exercises.

4. Format: Consider whether you prefer a self-paced online course or a more structured program with live lectures and assignments.

5. Cost: Compare the cost of different courses to find one that fits your budget.

Some popular digital marketing courses include the Digital Marketing Institute's Professional Diploma in Digital Marketing, the HubSpot Academy's Inbound Marketing Certification, and the Google Digital Unlocked program.