Sapna Johar leads growth and CRO content at CustomFit.ai, helping D2C brands turn conversion-rate optimization into a repeatable revenue engine. She writes the playbooks, case studies, and tactical guides that thousands of ecommerce marketers rely on each month.
Articles by Sapna
525 articles on CRO, A/B testing, personalization, and D2C growth.
What Is A/B Testing: How To Do It and Practical Examples
Learn what A/B testing is, how to do it step-by-step, and see real-world examples. Discover how tools like CustomFit.ai make A/B testing sim…
Conversion Rate Optimization (CRO): The Complete Guide for Ecommerce in 2026
Learn conversion rate optimization (CRO) for ecommerce in 2026. Improve conversions using A/B testing, personalization, and data-driven stra…
Best VWO Alternatives & Competitors in 2025 (Ranked)
Looking for VWO alternatives in 2025? Discover the top 10 A/B testing and personalisation tools that ecommerce brands use to boost conversio…
Best Visually Alternative for Shopify A/B Testing: CustomFit.ai
Looking for a Visually.io alternative for Shopify A/B Testing? CustomFit.ai offers a faster, flicker-free visual editor, personalization, an…
Best Intelligems Alternative for Shopify AB Testing Why CustomFit.ai Could Be the Better Choice
Looking for an Intelligems alternative? See why CustomFit.ai offers more than pricing tests—personalization, landing page optimization & fas…
Statistical Significance in A/B Testing: A Plain-English Guide
Statistical significance in A/B testing means there's less than a 5% chance your result is random. Here's what p-values, confidence levels, …
How A/B Testing Works: Step-by-Step Explained
A/B testing works by splitting traffic between two versions of a page, measuring which performs better on a conversion metric, and declaring…
A/B Testing vs Split Testing: What's the Difference?
A/B testing and split testing are the same thing — two names for the same experiment. Here's why the terms are used interchangeably and what…
A/B Testing vs Multivariate Testing: Which Should You Use?
A/B testing compares two page versions; multivariate testing tests multiple elements simultaneously. Learn when to use each for your ecommer…
A/B Testing Sample Size Calculator: How Many Visitors Do You Need?
Calculate how many visitors you need for a valid A/B test. Inputs: baseline CVR, minimum detectable effect, confidence level. Includes formu…
A/B Testing Mistakes: 15 Common Errors That Kill Your Results
The 15 most common A/B testing mistakes: stopping tests early, insufficient sample size, testing without a hypothesis, ignoring mobile, and …
A/B Testing Hypothesis: How to Write One That Wins
An A/B testing hypothesis predicts what change will improve a metric and why. Learn the proven formula: 'We believe [change] will [outcome] …
A/B Testing Examples: 30 Real Tests That Increased Conversions
30 real A/B testing examples across product pages, checkout, homepage, and email — with results, hypotheses, and what to test first on your …
A/B Testing Benefits: Why Every Ecommerce Store Needs It
A/B testing's top benefits: higher conversion rates, data-driven decisions, lower CAC, and better ROI from existing traffic. See real D2C re…
What Is A/B Testing? The Complete Guide for 2026
A/B testing is a method of comparing two versions of a webpage to find which performs better. Learn the complete A/B testing process, core c…
Website Personalization: The Complete Guide for D2C Brands
Everything you need to know about website personalization — strategy, implementation, and proven tactics for D2C and ecommerce brands that l…
Shopify & Ecommerce A/B Testing: The Complete Guide
Everything you need to know about A/B testing for Shopify and ecommerce stores — from setup to statistical significance to conversion wins.
Conversion Rate Optimization (CRO): The Complete Playbook for D2C Brands
A comprehensive CRO guide covering landing pages, product pages, checkout flows, and analytics — built for D2C and ecommerce brands that wan…
A/B Testing: The Complete Guide for Ecommerce & D2C Brands
Master A/B testing — from hypothesis to statistical significance — with practical examples for Shopify, WooCommerce, and D2C brands that wan…
Behavioral Personalization: Target Visitors by What They Do, Not Who They Are
Behavioral personalization shows different content to visitors based on their actions — pages visited, products viewed, cart activity, purch…
Step-by-Step Guide to A/B Testing on Shopify
Learn how to run A/B tests on your Shopify store to optimize conversions, improve user experience, and drive sales. Step-by-step guide with …
Shopify Theme A/B Testing: How to Test a New Theme Before Going Live
Shopify theme A/B testing lets you split traffic between your current theme and a new one — so you can measure conversion rate impact before…
A/B Testing Shopify Product Pages: What to Test and How to Do It
Learn how to A/B test Shopify product pages — the right elements, the right metrics, and how to run statistically valid tests without develo…
CRO for D2C Brands: How to Increase Conversion Rate Without More Ad Spend
A practical guide to conversion rate optimization for direct-to-consumer brands — covering product pages, checkout, homepage, and the full D…
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