A specialist ecommerce marketer understands that a small rise in ad costs can...

https://deansmasterjournal.hexaforgey.com/posts/how-do-i-improve-conversion-rate-without-discounting-everything

A specialist ecommerce marketer understands that a small rise in ad costs can wipe out the profit on a sale. They know how to connect product pages, paid ads and email, then judge results by orders and margin, not clicks alone