The principles are the same on any platform. Google has to crawl the page, work out what it sells, and rank it against everyone else selling the same thing. On Shopify, the difference is which of those steps the platform already does and which it leaves to you.
Shopify does the plumbing. Every store gets canonical tags, sitemap.xml, robots.txt, SSL and a title tag carrying your store name. The default robots.txt already blocks admin, cart, checkout, search, policy pages and filtered collection URLs at /collections/*+* (help.shopify.com, checked 4 September 2026). If an agency bills you for sitemap setup on Shopify, it is billing for something that ships free.
Stores separate on the part Shopify leaves to you. Four failure points account for most of the gap. An app fixes none of them.
First, collection sprawl, with tag pages competing against each other for the same query. Second, the same product reachable through several collection paths and variant parameters. We check where the canonical points instead of assuming. Third, a theme and app stack that gets heavier with every install. Fourth, a /blogs/ section with three posts from launch week and nothing since.
Fixing those four means working in the theme: templates, Liquid, structured data, the app list. That is developer work. Most SEO agencies hand it back to you as a to-do list. We are a Shopify Select Partner in Toronto with 200+ stores launched since 2021 (evdev.dev, 4 September 2026). The developers who fix the problem sit on the same team as the people who found it.
If your store is also changing platforms, decide the redirect map and the collection structure together. Our Shopify migration services start from CA$2,000 at a fixed price over 4 to 8 weeks (evdev.dev/shopify-migration-services, 4 September 2026). The SEO audit slots in before the URL map is frozen.