What this tells you
A winning-looking number is often just luck.
Statistical significance tells you how surprising the gap between your Control and Variation would be if the two really performed the same. The common standard is 95% confidence: if there were no real difference, a gap this large would show up by chance less than 5% of the time. It is not the chance that your variation is better. That is a different question, and it is the one Zyro's own test results answer.
Human intuition is poor at probability. A variation can look like it is winning, for example 50 conversions against 40, when mathematically that difference could easily happen by luck. This calculator does the maths so you decide on evidence, not a hunch. The default numbers are illustrative, swap in your own.