I'm in the process of creating an A/B test for either my...

I'm in the process of creating an A/B test for either my mobile or desktop platform, whether it be an app or a website, and I require guidance regarding certain aspects of the experimental design. Specifically, I need recommendations on the appropriate number of variations to test, the duration of the test period, and the division of test groups. Could you utilize ChatGPT to provide me with best practices tailored to my particular use case?