Optimizely helped us in running quick experiments on our websites. We used it for A/B testing in order to understand which call to action button colors/style/text was working better and converting more users. I personally set up the experiments and did the tests. The integration part was very easy.
If you are looking for a platform that will allow you to quickly do some experiments and A/B testing on your website/platform, then Optimizely is a great choice. For us, it was a perfect solution to test different call-to-action buttons, colors, and texts. It helped us figure out the winning one and we started using that version of our CTA.