Booking online has appeared as a buzz term. You can see its broad usage in varied fields: hotels, guesthouses, events, restaurants etc. Fortunately, WordPress is an amazing CMS and we can accomplish almost everything with WordPress plugins including booking online plugins.
Multivariate testing is an advanced version of A/B testing, so that it will have same core system mechanism of A/B testing. However, it requires more variations, longer time and also provides more reliable results.