Google Analyticis a best way forever to know all about your Blog activity .
To add Web Property ID to you blogger do this,
- First go to your Analytics account, your Google account handles it all.
- Got to >>Admin page ,
- Select your account and click on Property setting ,
- Here you will found your Tracking ID it will be like this one UA-12345678-9 copy it
- Now got to Blogger dashboard
- Go to >Setting>>Other and find Web Property ID it will be at end of page
- Paste the code you have copied from Google Analytics account property and click Save Settings and you have done it.