Why do I need a minimum number of visits to compute the results? How many visits is the minimum?

With a very low number of visits, you could not trust the results since they can be just due to pure chance. Imagine that only two people visit the variant of your tested page and both of them convert (100% conversion rate). Can you infer from this that everybody that will visit your site will convert? Clearly not.

Maybe the variant has a conversion rate of around 20% and it just happened by chance that the first two visitors converted. We need more visitors to see if this is the real trend or not.

Nelio A/B Testing does not require a minimum number of data to compute the results. However, to get a minimum level of confidence in the results, Nelio A/B Testing will not declare a winner until the test gets at least 500 page views.