![[Case Study] Sony A/B Tests Banner Ads](https://blog.optimizely.com/wp-content/uploads/2014/02/sony-150x25.png)
During a recent site audit, Sony tested the symmetry of its banner ads with promotional offers it was running online for customizable Vaio notebooks. The results led to a lift not only in click-through rates, but in engagement further down the funnel with visitors customizing their laptops. Read on to find out how …