Making better decisions online doesn’t require guesswork, it requires data.

Beginner’s Guide to A/B Testing, an Agent.so book, gives you a clear introduction to one of the most effective tools for improving your website, ads, and digital content: A/B testing.

This book helps you understand how small, strategic changes backed by real-world feedback can lead to meaningful improvements in performance, conversions, and business growth.

Learn the fundamentals of testing and experimentation

You don’t need to be a data scientist to start using A/B testing. This guide walks you through the basics of setting up tests with clear goals and simple methods, whether you’re experimenting with landing page headlines, button colors, or email subject lines.

You’ll learn what to test, how to test it, and how to collect and interpret results—all without technical overwhelm. With practical tips and real-life examples, you’ll discover how to use testing to validate ideas and make smarter, faster decisions.

Turn insights into improvements that compound over time

More than just tactics, this Agent.so book helps you develop a data-informed mindset. You’ll explore how to use test results to guide future strategy, avoid common pitfalls, and create a culture of continuous optimization in your business.

The included tools, platforms, and checklists make it easy to get started, whether you’re a solo founder or part of a growing marketing team.

Use this book to build confidence in your decisions, improve what’s working, and grow your business through smarter, simpler experimentation.