It's possible the impression share loss due to rank includes losing out on impressions that the campaign is eligible for but are very broad so you would not want to show for them anyway.
Why You Use Search with e-commerce Businesses Companies...
If you have extra ad spend to work with...
If you're already achieving 3%, 5% or even 10% conversion rates, is that as high as you're going to go?
A high level overview of how SEO works...
After a campaign has been built, but before it launches, we like to schedule a time with you to review the campaign before it goes live. This is to ensure that your initials goals are being strategically implemented, and allows everyone who's a part of the process to voice any concerns.
Yes you can with a smart strategy.
Search Terms Report for Smart Shopping -