Question concernant la descrption d'un job lié à Facebook

Bonjour,

Je suis jeune diplômé (école de commerce) et souhaite travailler à l'étranger une petite année, suite à divers candidatures, une entreprise me propose un job. Malgré la description du job ci-dessous et plusieurs appels téléphonique avec eux, je ne parviens pas à cerner clairement quelles seront mes missions. Alors si ici, se trouve des spécialistes des jobs liés à Facebook, un léger éclaircissement serait une aide non négligeable !:) D'avance un grand merci !!!!
Voici la description, c'est en anglais...

Advertising Account Manager

General Summary:
Will be responsible for managing Facebook's existing SMB advertising accounts via
phone and email. This includes the designing of new campaigns, optimizing existing
campaigns, measuring the performance and return of investment of these campaigns,
and supporting your advertisers with any platform issues.

Responsibilities:
??Manage a fixed list of 40-70 advertising accounts.
??Develop and/or optimize their campaign strategies.
??Reactively follow up on their platform issues.
??Support and handling of inquiries from advertising platform and maintain client
relationships.
??Up-selling of products, both from converting inbound inquiries into a sale and through
follow-up calls and emails.
??Maximize their return on investment.
??Proactively offer them new products.
??Reactively follow up on their platform issues.
??Identify trends to enhance the customer support process.
??Work cross-functionally with sales teams.