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
