If this is your first time here, you've automatically been placed into the 'a' variation for the experiment. This would normally be set by Optimizely or SiteSpect or whatever other A/B testing framework your business people have decided to use.
a variation
This button is boring as shit and I'd be completely surprised if anybody even clicked it.
b variation
I don't even need an a/b test to know this button is killing it.