Shared services is a nice word for Finace Administration department. It consolidates work like invoicing, cost centre allocation, credit collection and payment paperwork across different countries and businesses into team of administrators to execute them.

Career progression is of course limited, but as I have mentioned earlier your lack of experience and accredition will not get you anything significantly better than that. Your previous expeirence is already very patchy, best to stick to your next role for at least 2 years before moving.

Salary increments through job hopping can only be used sparingly, each time you use once, it reduces the chances of you getting another job within a short while.