When comparing your conversion data from Google Ads between Polar Analytics and Google, it is possible that you may notice slightly fewer conversions populating on Polar.
Assuming that you are comparing the same date ranges with the same attribution window settings, this difference in conversion data is likely due to a conversion delay with Google Ads (which you can see more information about from Google here).
In summary, Google Ads reports conversions on the date of the ad impression, whereas many other reporting tools attribute them to the date of the conversion itself. This is called a conversion delay. With that said, as conversions are reported on impression date (but the conversion itself actually happens after impression date), the number of conversions will continue getting updated retroactively for the past.
As Polar Analytics does not report real-time data, if Google updates the conversion numbers for a day in the past, we’ll need to wait for the data to be updated in Polar to be able to see the updated numbers. In the meantime, this is when you may notice the discrepancy between Polar and Google.
Next Step: You can find your conversion lag reporting data in the Campaigns table on Google or in your bid strategy report.