As a social media manager, you will most likely be working in the fields of corporate communications, online marketing, PR or journalism. There are many other topics in these areas that you can deal with in depth. For example, marketing, product management, public relations, sales, e-commerce, sponsoring and campaign management.
In the educational guide / compendium "Training and further education in the fields of marketing, communication and sales" you will find a list of all professions, further education and study programs as well as detailed descriptions of the associated job profiles. The PDF can be downloaded free of charge and without entering your e-mail address.
Have fun exploring!
Compendium "Education and training in marketing, communication and sales"