Currently, if you turn on
auto-tagging, when a user clicks on your ad, a unique
Google Click ID (
GCLID) will be generated that you can use to
track offline conversions using
UploadConversion. If a user clicks on your ad several times, you will get multiple GCLIDs, one for each click.
Click Performance Report shows click details by returning one row for each click, which is equivalent to one GCLID.
In Q4 2016, we will
change the timing of GCLID generation to
impression time (or when your ad is shown) instead. As a result, if a user clicks on a particular ad impression multiple times, those clicks will be associated with
only one GCLID. Consequently, landing page visits for the exact same impression will share the same GCLID value. This change opens the door for future improvements to user experience with Google ads.
To report the number of clicks associated with a GCLID, we are adding a new report field,
Clicks, to
Click Performance Report before this change. If your ads are normally clicked many times per impression, you will see
fewer rows returned by Click Performance Report. For click-time GCLIDs,
Clicks will always be returned as 1.
What you should do
- Ensure that your application is aware of multiple clicks to your landing pages with the same GCLID.
- Do not make any assumption that a GCLID is unique per click.
- If you use the Click Performance Report, be aware that you may get fewer data rows than before.
As always, if you have any questions, please post on the
forum or the
Ads Developers Plus Page.
- Thanet Praneenararat, AdWords API Team
