Phil presents learnings from a study of the top 1000 sites in UK that use Google Tag Manager. Using a combination of BuiltWith, GTMgrader, and ConsentModeMonitor Phil’s team built an automatic scoring system to assess which companies had the best technical set-ups. They clustered site`s by vertical then looked at common tags & technologies. For the top 5 best and top 5 worst, they did a deep dive into their technical set-ups using GTMspy. The winning sites were not what you would expect and the split between high quality set-ups vs paid tools varied WILDLY between brands. Phil spills the beans.