When you add UA on a Tool level, by default DTM outputs the UA library
and page view tracking on every page load, even when no Page Load Rules
(PLR) are in place.If you do not want UA to load on certain pages, you
can create a PLR with condition(s) to identify the pages (e.g. a URL
path) and then within Google Universal Analytics tool section of the
PLR, there is a checkbox labeled "Don't load Google Universal Analytics
on these pages" that you can check.So in other words, by default
everything ...