1、use google account  login gtm

2、create one container, then get  script, use same GTM code, put

different web site：A and B
So put it at two web site

3、Tiggers
．NAME： A page view
．Choose Event：Page view
．Configure Tigger：Page view
．Fire On：Page Hostname contains A.com

．NAME： B page view
．Choose Event：Page view
．Configure Tigger：Page view
．Fire On：Page Hostname contains B.com

4、add tag

．NAME：  A ga
．Choose product： google Analytics
．Choose a Tag Type：Universal Analytics
．tracert id：UA-xxxxxxx-x  (go to GA get website A’s GA code)
．tracert type：page view
．Fire on：Some Page ->  find Tiggers：A page view
．save

．NAME：  B ga
．Choose product： google Analytics
．Choose a Tag Type：Universal Analytics
．tracert id：UA-xxxxxxx-x (go to GA get website B’s GA code)
．tracert type：page view
．Fire on：Some Page ->  find Tiggers：B page view
．save

5、Publish

6、Go to GA, see real time. If different website, see different real time customer~~

Now can open website A and B, see GA real time customer~~