This is a part of the official Trailhead online training: Email Creation and Sending. I’ve used its content to list useful terms related to tracking and to refer to them as a useful glossary.
- Sent- Total number of emails sent.
- Delivered- Total number of emails delivered.
- Deliverability Rate - The percentage of emails that were delivered compared to the number that bounced (soft and hard).
- Total Soft Bounces - The number of emails that were recognized by recipients’ mail servers but were returned to the sender because their mailboxes were full or the mail servers were temporarily unavailable.
- Total Hard Bounces - Number of emails that permanently bounced back to the sender because the addresses were invalid.
- Email Opens- The total number of times subscribers open an email where the images render.
- Open Rate- The percentage of emails that were opened (images rendered) compared to the number that were delivered.
- Clicks- The number of subscribers who clicked on a link in the email.
- Click Rate- The percentage of subscribers who clicked on a link compared to the number of emails delivered
- Unsubscribes- Total number of subscribers who clicked unsubscribe.
- Unsubscribe Rate- Percentage of subscribers who clicked unsubscribe compared to total number of emails delivered
Resources
https://trailhead.salesforce.com/en/content/learn/modules/email-creation-and-sending