SMB marketers in the B2B sector say conversion rate optimization (CRO) is their top A/B testing priority in 2025, but a new report found most aren't running A/B tests to improve CRO. The " State of A/B Testing Report " from Unbounce found 56% of SMB marketers in B2B cite CRO as their top testing goal. However, only 32% are running A/B tests on their landing pages.