So for more context: I am using 3rd Party tool to visualize the data in Looker Studio (former DataStudio), a more concrete - Reporting ninja tool.

I have questions about these two metrics: page_impressions and page_impressions_unique. So from the reporting ninja told me that they only pull the information from the API. And I see big differences.

To be more specific I used the services from the developer to make a similar connector like Reporting Ninja, but custom, and compared these two metrics against each other and the results from META business suite Insights and they are 3 different results (focus mainly in page_impressions_uniqe and Unique Impressions), why this happens? From my developer code it is closer to the reporting ninja, but they told me they use the same metric, just the naming convention is different.