When you navigate to a web page where Tag Assistant is enabled, you are going to see the Tag Assistant icon with one of the following colors: Green Colour - Tag Assistant has found all of the identified Google Tags to be perfectly valid. Blue Colour - Tag Assistant has found Google tags that have no major or minor implementation issues but which are still not perfectly valid tags because of some non-standard GA implementation. Yellow Colour - Tag Assistant has found some or all Google tags with minor implementation issues. Red Colour - Tag Assistant has found some or all Google tags with major implementation issues.