Moonrank

Ad Copy skill

The playbook Moonrank's Writer Agent uses to write paid ads worth their auction price — one promise per ad, hooks drafted first, and a test grid that explains its own winners.

Download the methodology, see how the agent builds a test grid, or run it live inside the Writer Agent.

Get the skill fileTry the Moonrank Writer Agent
Category
Writer
Agent
Writer Agent
Format
ad-copy.md
Price
Free to download

The skill file

ad-copy.md
---
name: ad-copy
description: Write paid ad copy that fits each platform's format and character limits, with hooks and variants built for testing.
owner: Moonrank Writer Agent
---

# Ad Copy
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Free to download · account requiredTry the Moonrank Writer Agent
About this skill

What is the Ad Copy skill?

The Ad Copy skill is how Moonrank's Writer Agent writes for paid placements: fixing one message per ad, drafting hooks before body copy, rewriting per platform instead of resizing, and structuring variants so every test result carries a lesson.

It's written as a SKILL.md, a plain-language instruction format that people and AI agents can both follow. Read it to structure your own campaigns, hand it to whoever runs your ads, or let the Writer Agent produce the variant grid directly.

Downloading the playbook is free with a Moonrank account. Producing fresh variants as fatigue sets in, campaign after campaign, is what the Writer Agent does.

Example

See it in action

You ask

“Our CPCs have doubled in six months and CTR keeps sliding. We refresh the ads every month — what are we doing wrong?”

Agent does

Your refreshes reword the body and keep the hook — but all 12 active ads open with the same first line, so the platform sees one fatigued ad, not twelve. Three of them also make two promises each, splitting their own click intent. The fix: 8 new hooks against your one proven message, one promise per ad, and a grid where each variant changes only the hook. At your current spend, statistical significance arrives in about 10 days.

How it works

From input to fix list

  1. 1

    You provide the offer and platforms

    The promise, the audience, and each placement's real format and limits.

  2. 2

    Moonrank fixes one message per ad

    Every second benefit becomes its own variant instead of diluting the first.

  3. 3

    It drafts hooks, then fits the format

    Eight hooks per message, then per-placement rewrites within actual character limits.

  4. 4

    It builds the test grid and kill rule

    One variable per variant, landing-page match checked, and pause thresholds set upfront.

What's included

Everything it checks

One-message discipline

Each ad makes exactly one promise; extra benefits become separate variants.

Hook-first drafting

Eight opening lines per message, written before any body copy exists.

Per-platform rewrites

Search, social, and video versions written to each format's real limits — not resized.

Landing-page match

The ad's promise mirrored in the page headline, so the click doesn't bounce.

Single-variable test grid

Each variant changes one element — hook, proof, or CTA — so winners explain themselves.

Kill rule

Spend and CTR thresholds for pausing losers, defined before launch.

Use cases

When to reach for it

  • Rebuild a campaign where CPCs climb and CTR slides.
  • Turn one "best ad" into proper per-platform rewrites.
  • Launch with a variant grid instead of ten rewordings.
  • Diagnose ad fatigue before the algorithm prices it in.
  • Keep ad promises and landing pages saying the same thing.
Questions

Frequently asked questions

It's the Writer methodology Moonrank's Writer Agent follows — written out step by step, so you can read exactly how the work gets done rather than trusting a black box.

A plain-language instruction file that both people and AI agents can follow. Open it in any editor, paste it into Claude or ChatGPT, or drop it into an agent framework that reads skill files.

Yes. Every skill file is free with a Moonrank account — we ask for an email, not a credit card. Running the skill continuously against your site is what the paid product does.

Absolutely. The file is yours to adapt. Hand it to your team as a standard, run it manually, or point your own agent at it. Nothing in it depends on our platform.

The Writer Agent runs this methodology against your site on a schedule, prioritizes what it finds, and ships copy-ready fixes — no manual runs, no downloads to manage.

Related skills

Pair it with these skills

Writer

Copywriting

Write persuasive, benefit-led copy in the customer's own language, with proof next to every claim.

Writer

Landing Page Copy

Write a full landing page built to convert: clear hero, persuasive section flow, proof, one CTA.

Find out what AI says about your brand.