Google is refining the ways in which advertisers can exclude site categories from Display Network ad campaigns. The changes are occurring on the Google Display Network, and include the re-categorisation of several exclusions, with others being added or eliminated completely. Last week, users with older campaigns began seeing a pop-up telling them that certain options were no longer available, whilst new campaigns now show a fully updated version of the platform. Google has said that the reason behind the change is to help advertisers achieve their “brand suitability” goals, and help fight the possibility of a repetition of the advertising controversy that Google experienced earlier this year.