tttjjj/elt_bench huggingface dataset:
date: The date of the report and respective recorded metric(s); follows the format `YYYY-MM-DD`.
app_id: Application ID.
source_type: A source is counted when a customer follows a link to your App Store product page. 
There are 8 types of sources: App Store Browse, App Store Search, App Referrers, Web Referrers, App Clips, Unavailable, Institutional Purchases, and Null. Null is the default value for data that does not provide source types, including: crashes, subscription events and subscription summary.
More information can be found in the Apple App Store developer [docs](https://developer.apple.com/help/app-store-connect/view-app-analytics/view-acquisition-sources/).
device: Device type associated with the respective metric(s).
impressions: The number of times your app was viewed in the App Store for more than one second. This includes search results, Featured, Explore, Top Charts and App Product Page views. (Source: [BusinessofApps](https://www.businessofapps.com/insights/understanding-the-app-store-metrics/#:~:text=Impressions%20%E2%80%93%20%E2%80%9CThe%20number%20of%20times,was%20clicked%20on%20and%20viewed.))
impressions_unique_device: The number of unique devices that have viewed your app for more than one second on on the Today, Games, Apps, Featured, Explore, Top Charts, Search tabs of the App Store and App Product Page views. This metric is presumed to be de-duplicated daily as received from the source data, therefore, aggregating over a span of days is better done in the UI.
page_views: The total number of times your App Store product page was clicked and viewed; when a user taps on a link from an app, website or App Clip card that brings them to your App Store product page, the immediate product page_view is attributed to the referring app, website, or App Clip. (Sources: [Apple](https://help.apple.com/app-store-connect/#/itcf19c873df), [BusinessofApps](https://www.businessofapps.com/insights/understanding-the-app-store-metrics/#:~:text=Impressions%20%E2%80%93%20%E2%80%9CThe%20number%20of%20times,was%20clicked%20on%20and%20viewed.))
page_views_unique_device: The number of unique devices that have viewed your App Store product page; this metric is presumed to be de-duplicated daily as received from the source data, therefore, aggregating over a span of days is better done in the UI.