> ## Content Index
> Fetch the complete content index at: https://letterharbor-demo.synaps.media/llms.txt
> Use this file to discover other available public pages before exploring further.

# A glossary of newsletter terms
- URL: https://letterharbor-demo.synaps.media/library/glossary-of-newsletter-terms/
- Published: 2026-09-06T13:00:00.000Z
- Updated: 2026-10-26T22:26:59.000Z
- Description: Plain definitions of the words that show up in dashboards, sponsor emails and platform settings.
- Author: Avery Lin
- Tags: Reference, #resource

## Audience

- **Subscriber** — anyone on your list, free or paid.
- **Member** — on Ghost, a subscriber with an account; members can be free or paid.
- **Segment** — a subset of your list, such as paid members or readers in one region.

## Sending

- **Open rate** — the share of delivered emails that were opened. Increasingly approximate because of privacy features.
- **Click rate** — the share of delivered emails where at least one link was clicked.
- **Bounce** — an email that could not be delivered. Hard bounces are permanent; soft bounces are temporary.
- **Deliverability** — whether email reaches the inbox rather than spam.

## Money

- **CPM** — cost per thousand subscribers, a common way to price sponsorships.
- **Churn** — the share of paying subscribers who cancel in a given period.
- **MRR** — monthly recurring revenue from subscriptions.
- **Comp** — complimentary paid access given without payment.

## Content

- **Evergreen** — content that stays useful for a long time, such as guides and templates.
- **Paywall** — the point in a post where content is limited to members or paid members.
- **Archive** — the web collection of past issues.