Glossary of analytics metrics
Understand the analytics metrics used for tracking newsletter performance
| Metric Name | Definition |
| EditionURN | Unique identifier for each email |
| CampaignURN | Unique identifier for each campaign |
| First Send Unix Time | Time at which newsletter was first sent |
| Last Send Unix Time | Time at which newsletter was last sent |
| Num Recipients | Total number of recipients for an edition |
| Num Deliveries | Total number of deliveries for an edition |
| Num Opens | Total number of opens for a newsletter edition |
| Num Emails Interacted Via Unique Opens | Total number of unique emails (users) that opened the edition |
| Num Clicks | Total number of article link clicks for the edition |
| Num Emails Interacted Via Unique Clicks | Total number of unique emails (users) that clicked on a link within a edition |
| Num Emails Interacted Via Unique Clicks Or Opens | Total number of unique emails (users) that opened or clicked within an edition |
| Num Unique URL Clicks | Total number of unique article link clicks within a newsletter edition |
| Num Unsubscribes | Total number of unsubscribes triggered via the edition |
| Num Complaints | Total number of users that have complained (e.g. rejected as spam) |
| Num Bounces | Total number of users that bounced during sending (hard bounce) |