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docs: clarify Open Rate formulas for Prefetched Opens toggle #835

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docs: clarify Open Rate formulas for Prefetched Opens toggle #835

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6 changes: 4 additions & 2 deletions content/docs/reporting/enterprise-metrics-definitions.md
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
---
lastUpdated: "02/08/2020"
lastUpdated: "05/12/2026"
title: "Enterprise Metrics Definitions"
description: "Metrics definitions for Enterprise accounts"
---
Expand Down Expand Up @@ -44,6 +44,7 @@ The metrics available are:
| Unique Clicks Approximate | `count_unique_clicked_approx` | Number of emails that had at least one link clicked. Approximated with a 5% error threshold. |
| Unique Confirmed Opens | `count_unique_confirmed_opened` | Number of emails that were displayed or had at a link clicked. May take longer to update. |
| Unique Confirmed Opens Approximate | `count_unique_confirmed_opened_approx` | Number of emails that were displayed or had at a link clicked. Approximated with a 5% error threshold. |
| Unique Confirmed Non-prefetch Opens | `count_nonprefetched_unique_confirmed_opened` | Number of emails that were displayed or had a link clicked, excluding opens triggered by prefetch/bot activity. May take longer to update. |
| Rendered | `count_rendered` | Number of times emails were displayed. Applies only to HTML emails. |
| Unique Renders | `count_unique_rendered` | Number of emails that were displayed at least once. Applies only to HTML emails. May take longer to update. |
| Unique Renders Approximate | `count_unique_rendered_approx` | Number of emails that were displayed at least once. Applies only to HTML emails. Approximated with a 5% error threshold. |
Expand Down Expand Up @@ -76,6 +77,7 @@ Here are the definitions for each of these calculated metrics, including the for
| Block Bounce Rate | Percentage (Block Bounces / Sent) | Percentage of Sent emails that Block Bounced. |
| Undetermined Bounce Rate | Percentage (Undetermined Bounces / Sent) | Percentage of Sent emails that Undertermined Bounced. |
| Click-through Rate | Percentage (Unique Clicks / Accepted) | Approximate percentage of Accepted emails that had at least one link selected. |
| Open Rate | Percentage (Unique Confirmed Non-prefetch Opens / Accepted) | Approximate Percentage of Accepted emails that were either rendered or had at least one link selected. |
| Open Rate (Include Prefetched Opens) | Percentage (Unique Confirmed Opens / Accepted) | Approximate percentage of Accepted emails that had any tracking pixel rendered or at least one link clicked. Includes opens triggered by prefetch/bot activity. |
| Open Rate (Exclude Prefetched Opens) | Percentage (Unique Confirmed Non-prefetch Opens / (Accepted − Prefetched-only Openers)) | Approximate percentage of Accepted emails that had a non-prefetched open or link click. The denominator excludes recipients whose only observed activity was a prefetched open, so the rate is computed only over recipients with a determinable engagement signal. *Prefetched-only Openers = Unique Confirmed Opens − Unique Confirmed Non-prefetch Opens.* |
| Spam Complaint Rate | Percentage (Spam Complaints / Accepted) | Percentage of Spam Complaints. |
| Unsubscribe Rate | Percentage (Unsubscribes / Accepted) | Percentage of Accepted emails that resulted in unsubscribes. |
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