The Complete Digital Marketing Course | - 12 Courses In 1 Online ((full)) Free

Their "Fundamentals of Digital Marketing" course is accredited by the Interactive Advertising Bureau and covers 26 modules (roughly matching the 12 pillars).

The course is not legally free on Udemy, where it normally retails for $50–$150. However, the instructor and authorized partners occasionally offer it at no cost in three legitimate ways:

Identifying over 40 ways to promote and grow mobile applications. Accessing the Course for Free