Impressions from AdWords API does not match Google Adwords Web

[Amanda Fernandez Piedra]

I've been looking around the forum if I could find the answer for this.

I've been developing a python script which gets 3 different reports from AdWords API. 

One of them is an AD_Performance_Report in which I get the Impressions, Clicks, Costs, etc. 

But I can see that every data matches with Google Adwords Web except the Impressions.

Google Adwords API returns a lot more impressions than the Web.

Anybody can help me find why is happening that?

Thanks in advance.

[Sreelakshmi Sasidharan (AdWords API Team)]

Hi Amanda,

Could you please use the "Reply privately to author" option and share the below details with me:

1. Report definition

2. API Report

3. UI Report

Thanks,

Sreelakshmi, AdWords API Team

[Sreelakshmi Sasidharan (AdWords API Team)]

Hi Amanda,

I see that the report run from the API is not exactly the same as that extracted from the UI. The sum of impressions while using the ClickType field will not be accurate. Some impression will be double counted as the Ads can serve with multiple click types displayed and that is the reason for you observing higher number of impressions from the API. 

The help center document might be helpful for better clarity.