A/B Testing

### Giai đoạn: Nền Tảng & Khái Niệm Cốt Lõi **A/B Testing** A/B testing is a way to compare two versions of something to see which one works better. You split your audience into two groups, one sees version A, the other sees version B — and then you measure which version gets better results, like more clicks, sales, or sign-ups. This helps you make decisions based on real data instead of guesses. ### Khái niệm cốt lõi: 1. **A/B testing is a way to compare two versions of something to see which one works better** 2. **This helps you make decisions based on real data instead of guesses** ### Tài liệu tham khảo chính thống: - [A software engineer's guide to A/B testing](https://posthog.com/product-engineers/ab-testing-guide-for-engineers) (article) - [A/B Testing for Beginners](https://www.youtube.com/watch?v=VpTlNRUcIDo) (video)