Here's what I suggest you should do.
I'm assuming that you already have a well-stocked Shopify site with product pages that can convert.
If I assumed wrong you might want to work on your description to make sure your product pages can convert traffic from search engines.
It really would suck for you to follow what I'm about to say only for all this traffic to be wasted because your Shopify pages cannot convert squat.
With all that said if you want to get traffic for your Shopify shop you need to focus on the questions, people ask about the problems your product solves.
Pay close attention to what I just said, a product exists because it solves a problem.
So the key here is to identify the problems your product solves.
The good news is there's probably going to be a lot of these questions on Google autocomplete.
So basically, you go to google's main search box and enter in questions related to the problems your product addresses.
Scrape as many of these questions as possible.
The next step is to cluster them together because there are many different ways of asking the same question so cluster them together.
Finally put together answers that are not only easy to understand, but easy to share.
Format this content so it's easy to scan, skim and bookmark.
Publish the content in your blog and keep answering these questions.
Do not cannibalize the same question, by asking and answering the same question over and over.
Once you have several dozen of these, chances are enough of them will rank for you to start getting traffic and the next step is to go back to your posts and build text links to your Shopify pages.
These links must be strategically written.
You have to subconsciously promise the reader that when they click on a link the page that they will end up on is the extension of the content they are looking at.
In other words either it will deliver the solution they are looking for or it's somehow closely related to the page they're coming from.
There can't be like this black and white abrupt break between the content they're reading and your product sales page.