Difference Metric Between `ad_group` And `shopping_performance_view`

Hello, I found the difference metric `impressions` between `ad_group` and `shopping_performance_view`. I tried to get some metrics but cannot know why there is difference. I requested metics using AWQL. 1. Using `shopping_performance_view` SELECT campaign.id, campaign.name, ad_group.id, ad_grou

About Difference Metric Between `ad_group` And `shopping_performance_view`

Hello, I found the difference metric `impressions` between `ad_group` and `shopping_performance_view`. I tried to get some metrics but cannot know why there is difference. I requested metics using AWQL. 1. Using `shopping_performance_view` SELECT campaign.id, campaign.name, ad_group.id, ad_grou