Karl O'Brien
Karl O'Brien is a co-founder of StoreHero. He writes about ecommerce profit, marketing and growth for Shopify brands.
- Finance
The EU Just Changed the Rules on Shipping. Here’s What Every Ecommerce Brand Needs to Know.
EU shipping rules change on 1 July 2026. Discover how new import duties could affect ecommerce margins, returns and EU fulfilment.
- Marketing
The Problem with ROAS: why it’s blocking your Shopify growth
Focusing only on ROAS misleads Shopify store owners, as it ignores key costs—meaning a high ROAS doesn’t always equal profit.
- Marketing
Are your repeat customers driving enough profit?
Track repeat customers profitability with AI cohort analysis for your Shopify store and make data-driven decisions to boost growth.
- Marketing
7 Key Metrics That Your Ecommerce Dashboard Should Have
Essential ecommerce dashboard metrics that drive acquisition, boost conversion, enhance retention, and maximize profitability.
- Marketing
How Health and Beauty Brands Can Grow in 2025
Health and beauty brands face rising costs in 2025. Learn strategies improve Black Friday ad profitability, scale effectively, and outperform competitors.
- Platform
StoreHero and Recharge: Elevating Your Subscription Management
Manage your subscriptions and profits like a superhero with StoreHero’s Recharge integration. Discover the powerful benefits of this seamless integration.
- Finance
Contribution Margin Formula: The Complete Guide for Ecommerce (With Worked Examples)
The contribution margin formula, worked through an example DTC order and month: CM1, CM2 and CM3, per unit, ratio, income statement, weighted average and how to set a target from your fixed costs.
- Finance
Mastering Unit Economics: Key to Ecommerce Success
Master unit economics for ecommerce growth. Learn key metrics like LTV/CAC ratio and CAC payback period. Optimize costs and maximize revenue.
- Finance
Understanding E-Commerce Profit Margins
Learn how to determine your businesses financial health and make better decisions to grow profitably with StoreHero.
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