Auto-tagging is an advanced feature that you need to turn on before you can do the following:
- Import conversion data into AdWords from Google Analytics, as well as other external sources, such as your Customer Relation Management (CRM) system
- Import AdWords campaign and cost data into Google Analytics reports
- Import Google Analytics site engagement metrics, such as bounce rate and average session duration, into AdWords reporting
This article explains how auto-tagging works and how to enable it.
Why use it
Auto-tagging is a required feature that can help you better understand how people interact with your ads, your website, and your offline sales channel. It's also required for businesses that want to track offline conversions, such as sales that happened at your physical shop because of your online advertising.
How it works
After someone clicks your ad, auto-tagging adds a bit of additional information — a parameter called GCLID, short for "Google Click Identifier" — to the URLs people click through. For example, if someone clicks on your ad for
www.example.com, the final URL will look like
www.example.com/?gclid=123xyz. If you have auto-tagging enabled and have a Google Analytics tag on your website, the GCLID is stored in a new Google Analytics cookie on your site’s domain (learn more about how AdWords tracks website conversions).
Sometimes the GCLID is created at the time of an impression, rather than a click. In those cases, if a user clicks the same ad again, the same GCLID will be used. In the click performance report, multiple clicks on the same ad by the same user are counted as multiple clicks in the same GCLID row.
A small percentage of websites don't allow arbitrary URL parameters and serve an error page when auto-tagging is turned on. Check with your webmaster to see if this applies to you, or turn on auto-tagging and do a test by clicking on your ad. If the link to your site works, then you can use auto-tagging. If you get an error, you'll need to turn auto-tagging off from your AdWords account. Then, ask your webmaster to allow arbitrary URL parameters before turning it back on.
Set up auto-tagging
Auto-tagging is turned off by default. To turn it on, follow the steps below. If you’re unable to use auto-tagging, you can use manual tagging to import AdWords data in Google Analytics.
Choose the AdWords experience you're using. Learn more
- Sign in to your AdWords account.
- In the left page menu, click Settings.
- Click Account settings along the top of the page.
- Click the Auto-tagging section.
- To enable auto-tagging, check the box next to “Tag the URL that people click through from my ad.”
- Click Save.