The short answer here is that it depends. While most of the skills that an expert ecommerce consultant needs to be successful can be learned on the job, certain certifications are helpful. For example, if someone has a Content Marketing Certification from HubSpot, then you know they have the right information and skills they need to uplevel your content. Additionally, a Google Analytics certification or the Fundamentals of Digital Marketing certification from Google are great examples of qualifications that can help your consultant be successful.