I have used Proun in many different ways as my business has grown over time from local businesses looking at national exposure - through-to working with clients that are now considered global brands! It's so easy (and cheap!) when you're just starting out or even if it feels like your client services team could do more work themselves but want someone else doing this part of their marketing mix too then use PU underground because they will help YOU make sure all aspects get done right!! My website traffic increases month after months by getting featured across various platforms suchas CNN & Yahoo Finance etc..