網站:
https://chrome.google.com/webstore/detail/tag-assistant-by-google/kejbdjndbnbjgmefkgdddjlbokphdefk/related?hl=zh-tw
功能:
檢查GA是否有問題
https://developers.google.com/analytics/devguides/collection/analyticsjs/?hl=zh-cn
延伸
http://newaurora.pixnet.net/blog/post/171431715-google-analytics%E4%BD%BF%E7%94%A8analytics.js-%E4%BA%8B%E4%BB%B6%E8%BF%BD%E8%B9%A4