There are a lot of posts out there with titles like “10 A/B testing mistakes you are making”. They offer advice on sample sizes and statistical pitfalls. Truthfully however, few conversion programmes struggle because of this type of mistake.
Conversion Rate Optimization (CRO) has been a “thing” for a while now, and there is a lot of expertise out there. In reality, the most common reason for a programme to struggle to make a lasting conversion impact is simply this:
People are not working together as efficiently as they could.
If you see this problem in your company, try holding a CRO hackathon.