I would say the best digital marketing course is copywriting. This is because copy (writing) is in everything from social media posts to online ad campaigns. You would learn about SEO; how to write persuasive copy for people to take action; and writing video or social media scripts.
f you want to get trained in the field of Digital Marketing and want to make a career in this field then I would suggest one training platform Where you can learn all the skills which are required in the field of Digital Marketing that is Board Infinity.
Board Infinity Provides courses for the working professionals and their courses are also suitable for beginners and non-MBA aspirants. Check this awesome course Learning Path in Digital Marketing with Certification by Board Infinity