GA& GTM conceptual

In a tiny nutshell

Conceptual model:

Development guides:

• https://developers.google.com/analytics/devguides/collection/analyticsjs/pages
• https://developers.google.com/tag-manager/devguide

Roughly explained:

• Google Analytics 
  • Hit types are listed externally here (primarily pageview, event)
  • What data is per default send with which names: here (external link) 
  • Different transport mechanisms are available, per default image. By using image a small 1×1 pixel image is requested. The requested URL takes all parameters to send. 
• Google Tag Manager
  • Google Tag Manager Data Layer is a JavaScript array that holds tag/triggers/variables
  • There are two ways, how to add data to the Data Layer (cool external reference):
    • (DO NOT USE) By adding dataLayer snippet above the GTM container snippet. This is called “Data Layer declaration”
    • Or by pushing data with dataLayer.push method.