An A/B testing variant refers to one of the multiple versions of a webpage, email, or advertisement that is created and tested against another version to determine which one performs better. This method, also known as split testing, allows businesses to compare different elements, such as design, content, or call-to-action, to see which one resonates more with their audience and leads to higher conversions. By analyzing the results of A/B testing variants, companies can make data-driven decisions to optimize their marketing strategies and improve their overall performance.