One way to succeed with SEO is to create a lot of content.
You want that content to be appealing to both search engines and customers. Search engines are okay with ugly sites but customers want nicer looking ones. Or at least, easy to read sites.
I first learned about today's tip from using WordPress.
What you want to do is to create a hidden page in Shopify and fill it up with all of the different content options.
Things like bold, underlines, quotes, and all the different kinds of headers.
Save that page and now you can preview it in your online store to see exactly how your theme styles everything.
Using this as a canvas, you can make better visual choices for your product pages, blog posts, and general Shopify pages.
Another great optimization is to make sure your product's structured data is setup correctly for Google's Rich Snippets. With those you'll get more traffic and better converting traffic.
You can either audit your store's structured data by hand or install JSON-LD for SEO and have all the structured data you need.
It's already helping over two thousand Shopify stores with their structured data and it could help you too.