Growth Marketing Hub

Featured Playbooks

Templates and frameworks you can actually use

Your Level: Growth Hacker

450 pts

Meta Hooks Playbook

Master the art of scroll-stopping hooks that convert on Facebook and Instagram.

Progress 75%

15 templates

New

Video

4.7

YouTube SEO Hacks

Optimize your videos to rank higher and get discovered by your target audience.

Progress 10%

12 templates

Advanced

Analytics

4.8

Funnel Tracking Outlines

Track every step of your customer journey with these ready-to-use templates.

Progress 0%

8 templates

Growth Experiment of the Month

April 28, 2025

Email Subject Line A/B Test

By Sarah Johnson, Growth Lead at TechCorp

+32% Open Rate

Increased from 18.5% to 24.4% across 50,000 subscribers

The Hypothesis

Using question-based subject lines with personal pronouns (you/your) will increase open rates for our product announcement emails.

A

"Introducing Our New Analytics Dashboard"

18.5% open rate

B

"Is your marketing data working for you?"

24.4% open rate

Key Learnings

Questions create a curiosity gap that drives opens

Personal pronouns (you/your) create relevance

Problem-focused subjects outperformed feature announcements

Shorter subject lines (under 50 characters) performed best

Implementation Timeline

Day 1-2: Hypothesis & Setup

Day 3-5: Email Creation & Segmentation

Day 6-13: Campaign Run & Data Collection

Day 14: Analysis & Documentation

146 marketers tried this

Case Studies

Real-world breakdowns of experiments, wins, and fails

Success E-commerce

How FashionFwd Increased Conversions by 43%

A complete redesign of their product pages with a focus on social proof and urgency.

Emma Richardson

Read Case Study

Success SaaS

CloudTech's Onboarding Revamp That Cut Churn by 35%

Simplifying the first-time user experience with guided tours and progress tracking.

Michael Chen

Failure Mobile

Why FitTrack's $50K UA Campaign Failed (And What They Learned)

A cautionary tale of poor audience targeting and creative misalignment.

James Wilson

Creative Lab

Inspiration gallery for ads, hooks, CTAs, and landing pages

Facebook Ad: FitLife App

3.2% CTR, $1.45 CPA

Email: CloudTech Newsletter

42% Open Rate, 12% CTR

Landing Page: FashionFwd

18% Conversion Rate

Instagram Ad: TravelEase

4.5% CTR, $2.10 CPA

Google Search Ad: HomeServe

8.2% CTR, $22 CPA

Email: Welcome Sequence

68% Open Rate, 24% CTR

YouTube: TechReview Thumbnail

12.4% CTR, 65% Watch Time

Product Page: EcoGoods

22% Conversion Rate

Growth Vault

Quick access to CAC models, churn forecasts, ROAS calculators

CAC Calculator

Calculate your Customer Acquisition Cost across channels and campaigns.

Total Marketing Spend ($)

New Customers Acquired

Your CAC: $20.00

ROAS Calculator

Measure your Return On Ad Spend to optimize your marketing budget.

Revenue from Ads ($)

Ad Spend ($)

Your ROAS: 3.0x

Churn Forecast

Predict customer churn rates and revenue impact over time.

Current Customers

Monthly Churn Rate (%)

Customers in 6 months: 735

Media Corner

Quick-hit 10-min growth talks and podcasts

Podcast 10 min

Why Most A/B Tests Fail (And How to Fix Them)

Statistical significance, sample sizes, and the common pitfalls of testing.

Rebecca Martinez

4.2K listens

Video 8 min

5 TikTok Ad Formats That Are Crushing It Right Now

The latest creative formats driving engagement and conversions on TikTok.

Daniel Kim

7.8K

Podcast 12 min

The Email Sequence That Generated $250K in 30 Days

Breaking down the psychology and copywriting behind a high-converting email campaign.

Olivia Thompson

3.5K

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