In addition to the certification required by their state, many TC’s also have experience working with real estate, lenders, title companies, escrow, and the MLS. These topics are heavily related to transaction coordination, and an understanding of them is something your clients will expect.
If you don’t have personal experience with these topics you will want to invest in some real estate educational courses beyond what is required to obtain your TC certification. It would also be a good idea to find a mentor to help you get acclimated to the industry, and your position within it.
Even if you have a background in real estate, finding a good TC mentor would definitely give you an advantage in the long run. Having a mentor allows you to learn from years of on the job experience, which is an invaluable resource.