It was a combination of practice materials and very typical questions about your experience. It wasn't particularly difficult but I would recommend that you prepare well for it. Very friendly people
The interview process was smooth. There were three rounds of interviews and reference calls. Interviews were with different levels within the company's organization. Each interview was a bit different. The first was a general interview, the second and third interviews were directly about experience and growing with the company.
Interview questions [1]
Question 1
What were some brands and accounts you would be interested in working with?