1. Project Impressions - the number of times a project has been loaded, whether in or out of view.
2. Viewable Project Impressions - the number of times a project loaded, and was at least 50% within the viewable viewport for at least 1 second.
3. Scene Impressions - total sum of all scene views, including views resulting from auto-advance.
4. AVG Scene Time - the average time spent on individual scenes. Every time a user changes a scene, we send a time e.g. 5 seconds, and it's the average of those. Auto-advance implies a maximum for this value. The timer is capped at 20 seconds, to prevent skewing the average when the page is left open, and there is no auto-advance.
5. AVG Project Time - the average time spent on a story, which is recorded independently from scene time and capped at 100 seconds if the browser is left open.
6. Ad-server Clicks - the number of times we’ve fired the click macro to register an ad-server click.
7. CTR - the percentage of impressions that led to an ad-server click.
8. AVG Depth - how far (number of scenes) is reached into a story on average. This is calculated as: (scene impressions / story impressions) / number of scenes* 100.
In the case of auto advance, it may not be due to user interaction.
9. AVG Engaged Depth - the same as AVG Depth except excludes first scene impressions (excludes users who didn't interact with the story).
10. Interactions (engagement rate) - the number of users that interacted with the story (only the first interaction is counted for each story load). This could mean they went to the next scene, opened the share menu, or unmuted a video. It is generally fairly similar to the second scene impressions, since going to the next scene is the most common first interaction.
11. Interaction rate (IR) - calculated as number of interactions / number of story views and shown as a percentage.
12. Viewable Interaction Rate (VIR) - the percentage of viewable project impressions that led to an Interaction.
13. Link clicks - the total number of clicks / taps on various link layers (shape, text, quiz or poll options etc.)
14. Link click-outs - the number of times a user has opened an external URL from a link layer.
15. Attachments (swipe-ups) - the total number of Attachments that were opened in a project. Attachments are tracked separately to ad-server clicks, despite the buttons often looking similar.
16. SUR (swipe up rate) - The ratio of attachments (number of times opened) to project impressions.
17. Heavy Ads - The number of times there was a heavy ad intervention (the project ad was removed by the browser for using too many resources).