Newsletter and social media terms

Algorithm

The ranking system that decides who sees a post. It rents you attention on its terms and can change those terms without notice.

Attribution

Connecting a sale or signup to the content that influenced it, so you know which work is doing the earning.

Bounce rate

The share of sent emails that could not be delivered, split into permanent hard bounces and temporary soft bounces.

Carousel

A multi-slide post the reader swipes through. Each slide has to earn the next swipe, which is why carousels reward structure.

Character limit

The per-post length ceiling each social platform enforces, such as 280 characters on X and 500 on Threads.

Click-through rate (CTR)

Clicks divided by delivered emails. Platforms disagree on the denominator, so the same send can report different rates.

Click-to-open rate (CTOR)

Clicks divided by opens instead of deliveries. It measures how well the content served the readers who showed up.

Content calendar

A schedule of what publishes where and when, turning consistency from daily willpower into a visible plan.

Conversion rate

Three different newsletter metrics share this name: signup conversion, send conversion, and subscriber conversion.

Cross-posting

Publishing the same content to several platforms. Done verbatim it underperforms everywhere, because each platform rewards a different native shape.

Deliverability

Whether your emails reach the inbox at all, driven by sender reputation, authentication, and list hygiene.

Delivered, sent, and opened

Four different counts hide behind newsletter rates, and the same send can report very different numbers depending on the denominator.

Engagement rate

Interactions divided by reach or followers. It signals whether content resonated, not whether it sold anything.

Follower count

The number of accounts subscribed to your profile. It is the most visible audience number and the least reliable one.

Hook

The first line of a post, which decides whether the rest gets read. Feeds truncate, so the hook is most of the post.

Impressions

The total number of times a post was shown, counting repeat views. Impressions always meet or exceed reach.

Link in bio

The single clickable destination on a social profile. It is the one piece of a platform profile you fully control.

Link preview

The card a platform renders when you share a URL, built from the page’s Open Graph tags. A broken preview kills click-through.

List churn

The rate at which subscribers leave through unsubscribes, bounces, and inactivity. Growth minus churn is what actually compounds.

List value

An estimate of what your email list is worth as an asset, based on size, engagement, and how it converts.

Newsletter ROI

What the newsletter returns against what it costs to produce, measured from provider-reported facts rather than invented attribution.

Open rate

The share of delivered emails that were opened. Privacy proxies inflate it, so treat it as directional rather than precise.

Posting cadence

How often you publish on a platform. The sustainable rate beats the impressive one, because consistency is what compounds.

Reach

The number of unique accounts that saw a post. Reach is rented: the platform decides who sees your work.

Repurposing

Turning one piece of work into several: an edition becomes a thread, a post, and a carousel. The signal compounds while the effort does not.

Revenue per subscriber

Revenue attributable to the newsletter divided by active subscribers. It turns an audience count into a business number.

Saves and shares

The two engagement signals that travel. A save means the post was worth keeping; a share means it was worth a reputation.

Subject line

The one line that decides whether a send gets opened. Clarity and length matter more than cleverness.

Thread

A sequence of connected posts that reads as one piece, letting a longer argument live on platforms built for short posts.

UTM parameters

Tags appended to links that tell analytics where a visitor came from, so a newsletter send shows up as a source instead of "direct".