Multivariate testing is similar to A/B testing, but it checks several changes on one page at the same time. Instead of testing only button color, it can test the headline, image, and button together. Different combinations are shown to visitors, and the system tracks which mix performs best. This method works better when a website has high traffic because it needs many visitors for clear results. Without enough data, results may not be accurate. When is multivariate testing the right choice?