PRWeek's third Agency Excellence Survey shows that firms need to maintain client service and adapt to changing priorities.

Determining success in PR is ultimately a subjective exercise. But impressions can be quantified, and the thoughts of many clients together can form a revealing picture of where the agency world stands in its quest for happier – and higher-spending – clients.

PRWeek's Agency Excellence Survey, now in its third year, is a useful tool for tracking how firms perform in the eyes of ...