# Offer Testing > Use when designing copy experiments to optimize hooks, offers, and CTAs. - Skill: `tomevault-io/offer-testing` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/offer-testing` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/offer-testing/raw - Safety review: pending (external: skill-scanner PASS, skillspector PASS) - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Marketing & Growth - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/offer-testing --- # Offer Testing Playbooks Skill ## When to Use - Planning subject line/CTA/offer tests across email, ads, or landing pages. - Validating new positioning or pricing language. - Running copy refresh cycles for campaigns. ## Framework 1. **Hypothesis** – statement of expected lift + rationale. 2. **Variable Selection** – hook, CTA, body copy, offer framing, proof element. 3. **Segmentation** – define audience splits and holdouts. 4. **Metrics** – primary KPI + guardrails (opens, CTR, CVR, CPL, unsub, spam). 5. **Analysis** – statistical significance (chi-square, z-test) or Bayesian approach. ## Templates - Experiment brief (variable, control, variant, KPI, sample size, duration). - Results report (metric table, significance, insight, next steps). - Prioritization matrix (ICE/RICE scoring). ## Tips - Limit to one variable per test to isolate learnings. - Ensure minimum sample sizes per channel before declaring winners. - Log tests and learnings in a shared repository. --- --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/gtmagents) — claim your Tome and manage your conversions.