The means and inclination to test SEO changes is growing within the industry (finally), but a willingness to test does not always mean it will be successful and worth doing. Not everything is worth testing, and not everything is easily testable. So what follows are some of my lessons/examples from testing SEO changes (split testing or otherwise).
The star rating rich result is one of the most sought-after SERP features for many SEOs. The main reason for this is that if you are listed as a rich result, searchers will notice you more because you stand out from the other search results. This can lead to a higher click-through rate (CTR).
Most SEOs will be comfortable/familiar with using Google Search Console as part of their SEO toolkit. But there are some great ways to better utilize this data without introducing additional cost or complexity into your reporting.