A/B testing is a way to compare two versions of a product or feature to see which one performs better. It is often used in marketing and product development to help determine the best course of action based on data. For example, if you are considering making a change to the layout of a website, you could use A/B testing to determine whether the new layout leads to more sales or a better user experience. A/B testing can help you make informed decisions about your product or marketing efforts by providing data on how different versions of a product or feature perform.