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Reports Overview: Metrics, Columns, and Use Cases

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The Newsletter Engagement Reports section includes an All Emails table that already lists metrics like sends, opens, and clicks. The change adds a new column showing which audience segment each edition was sent to. This requires a minimal update: adding Audience Segment to the column list with a brief description.


Letterhead offers three report types — Clicks, Newsletter Engagement, and Audience Growth — to help you track performance, optimize content, and monitor subscriber trends. This reference explains what each column means. For the full Reports feature area, see Working in Reports; to generate and email a report, see How to Export Reports.

Clicks Reports show how recipients interact with the links in your newsletters.

  • Publication Date — the date the newsletter edition was published.
  • Edition ID — the unique identifier for a specific newsletter edition.
  • URL — the web address of a link included in the newsletter.
  • Total Clicks — all link clicks across all emails sent; multiple clicks from the same email are counted.
  • Unique Clicks — the number of unique emails that had a link clicked; repeat clicks are not counted.
  • Average Time to Click — the average time between when the newsletter was sent and when recipients first clicked this link.
  • Click Speed — indicates whether readers engaged with this link fast, at a medium pace, or slowly.
  • Channel ID — the unique identifier for the channel.
  • Analyze link performance to see which links engage your audience most — and what content resonates.
  • Track click timing to understand how quickly readers act on your content after it lands in their inbox.
  • Optimize content by tailoring future issues to the links readers actually click.
  • Track engagement over time by reviewing Clicks Reports regularly, and use date filters to analyze a specific period.

These reports show how each newsletter edition performed, and can be scoped to specific channels.

  • Edition ID — the unique identifier for a specific newsletter edition.
  • Channel — the name of the channel (newsletter).
  • Edition Subject — the subject line of the published edition.
  • Audience Segment — the audience segment the edition was sent to.
  • Sent — the total number of newsletters sent.
  • Total Legacy Opens — total opens, indicating overall interest.
  • Unique Legacy Opens — unique recipients who opened the newsletter.
  • Total Clicks — all link clicks within the newsletter.
  • Unique Clicks — unique recipients who clicked a link.
  • Average Time to First Click — the average time between when the newsletter was sent and when recipients first clicked any link in the edition.
  • Delivered — newsletters successfully delivered to inboxes.
  • Accepted — emails accepted by recipients’ email servers, calculated as sent minus soft bounces.
  • Cleaned (Bounces) — bounced emails that could not be delivered.
  • Newsletter Click-to-Open Rate — unique clicks divided by unique opens.
  • Unsubscribes — recipients who unsubscribed via the unsubscribe link or List-Unsubscribe header on that edition.
  • Promotion Clicks — clicks on promotional links.
  • Promotion Click-to-Open Rate — promotional clicks divided by unique opens.

Note: The Unsubscribes column here counts only people who unsubscribed from that specific edition. Total Unsubscribes in the Audience Growth report reflects all unsubscribes across all methods since the channel began.

  • Analyze engagement to identify what content resonates.
  • Track response timing to see how quickly your audience acts on your newsletters.
  • Optimize content based on which newsletters and links perform best.
  • Track trends by reviewing engagement reports regularly.

Available on both Organization and Channel level Reports pages, this report exports your audience growth metrics over a chosen date range.

  • Channel — the name of the channel (newsletter).
  • Total Active Subscribers — the total number of active subscribers.
  • Total Audience (Excludes Cleaned) — active subscribers + not subscribed + pending + unsubscribed as of the date listed.
  • New Subscribers — new subscribers added on each date.
  • Total Not Subscribed — audience members not subscribed.
  • Total Pending Opt-In — audience members who haven’t confirmed their subscription.
  • Total Unsubscribes — audience members who have unsubscribed from the channel.
  • Total Cleaned (Bounced) — emails that could not be delivered. See hard vs. soft bounces.
  • Analyze growth trends to see which strategies grow your audience.
  • Monitor unsubscribes — spikes can point to areas for improvement.
  • Set benchmarks based on your growth metrics to track progress toward realistic goals.

Still can’t find what you need? Contact support.