Recommendation widget, placement pages
| Metric | Name | Description | Type | Filtering option | Minimum date for report generation | 
| 
 | Widget impressions | An impression is when a widget is shown to the page user. A widget impression is counted if at least one article was in the user's viewport for at least 2 seconds and in at least 50% of the cell. Built on the  | 
 | present | 2020-03-01 | 
| 
 | Clicks on recommendations in widget | Number of clicks on recommended articles in the widget. Built on the  | 
 | present | 2020-03-01 | 
| 
 | Widget visibility percentage | The ratio of the number of widget impressions to renderings. Built on the  | 
 | present | 2020-03-01 | 
| 
 | Widget CTR | The ratio of the number of clicks on the widget to the number of impressions. If a user opens several articles in the widget at once (for example, each article is opened in a new browser tab), all these clicks are taken into account in the widget CTR. Built on the  | 
 | present | 2020-03-01 |