Metrics:

Clicks: Total clicks on the document ads. Click not de-duplicated

Click-Through Rate (CTR): Total clicks divided by total impressions

Download clicks: Number of clicks on the download button

Viral Download clicks: Number of clicks from the result of a user sharing to your network

Displays: How much of your document was displayed/viewed by members (25%, 50%, 75%).

Completions: How many audiences completed viewing the document