Free Google's Fundamentals of digital marketing
https://learndigital.withgoogle.com/digitalgarage/course/digital-marketing
Social Media specific
[] https://blog.hootsuite.com/brand-certifications-social-media-marketing/
[] https://education.hootsuite.com/pages/certifications/
[] https://academy.hubspot.com/courses?page=1#products=social;certsOnly=true;
[] https://www.facebook.com/business/learn/certification?ref=ens_rdr
Other Google marketing/business courses
https://learndigital.withgoogle.com/digitalgarage/courses
National Institute for Social Media
https://nismonline.org/
Graduate Certificates in Social Media
[] https://www.snhu.edu/online-degrees/certificates/graduate-social-media
[] https://scs.georgetown.edu/programs/395/social-media-management/
[] https://www.middlesex.mass.edu/careertraining/socialmedia.aspx
[] https://catalog.tamu.edu/undergraduate/liberal-arts/communication/social-media-certificate/
[] https://www.learning.depaul.edu/eCS/CourseListing.aspx?master_id=1074&course_area=KMC&course_number=145&course_subtitle=00
[] https://www.sps.nyu.edu/professional-pathways/certificates/marketing-and-public-relations/social-media.html
MOCs
[*] https://www.coursera.org/specializations/social-media-marketing