An SEO app can write a thousand meta descriptions while you have lunch, keep your structured data valid, and stop a redirect going missing when someone renames a product. What it cannot do is make a slow theme fast, decide which of your five near-identical collection pages deserves to rank, or write anything a buyer actually searched for.
Six apps below, grouped by the job they do, then the five ranking problems that no app on the App Store touches — which is where most stores’ traffic is actually stuck.
Summary
- Yoast SEO — editorial guidance and templated metadata for teams that know it from WordPress.
- Smart SEO — metadata, schema, alt text and speed items in one, at a lower price.
- Plug in SEO — the long-standing all-rounder with issue checks and reporting.
- Avada SEO — SEO plus image optimisation and an audit checklist.
- SearchPie — SEO, schema and speed tooling bundled.
- JSON-LD for SEO — structured data only, done properly.
What Shopify gives you already
Editable titles, descriptions and handles on every product, collection, page and post; automatic canonical tags; an automatically generated sitemap; a robots.txt you can edit through the theme; automatic 301s when a handle changes (in most cases); and basic Product schema from most themes. That is the foundation, and on a store with a hundred products and someone writing titles by hand, it is enough.
1. Metadata and editorial guidance
Yoast SEO
Yoast SEO brings the WordPress workflow to Shopify: templated titles and descriptions across product and collection types, readability and keyword guidance in the editor, schema output, and social previews. Teams that already run Yoast elsewhere get a familiar interface and consistent rules; the guidance is a checklist, not a strategy, and should be treated that way.
Smart SEO
Smart SEO automates the same ground at a lower price: bulk meta tags from templates, JSON-LD schema, image alt text, broken-link detection and a few speed items. For most mid-size catalogues this is the pragmatic choice.
Plug in SEO
Plug in SEO has been on Shopify longest: continuous issue checks (titles, headings, speed, broken links), bulk editing and reporting that a non-specialist can follow. Useful as a monitor as much as a fixer.
2. Schema, done properly
JSON-LD for SEO does one thing: complete, valid structured data for products, collections, articles, breadcrumbs and FAQs, including the fields themes usually omit. It is the right pick when the audit says your markup is incomplete rather than absent, and it matters more each year — the same structured data is what AI assistants read when they decide whether to recommend your store. See our AI apps and agentic commerce guide.
One rule: run one source of Product schema. A theme emitting its own, plus a review app’s, plus an SEO app’s, produces conflicting markup and Google ignores all of it. That is the most common schema finding in our free SEO audit.
3. Images, speed and the bundles
Avada SEO and SearchPie both bundle SEO with image compression and speed features. They are convenient, and the speed half should be read with the caution in our speed apps guide: image compression genuinely helps on uncompressed catalogues, script-level “optimisation” can break other apps, and neither touches the theme JavaScript that causes most slow stores.
Quick comparison
| App | Metadata at scale | Schema | Image SEO | Redirects / links | Price band | Best for |
|---|---|---|---|---|---|---|
| Yoast SEO | Templates | Yes | Basic | Basic | Mid | Teams used to Yoast |
| Smart SEO | Templates, bulk | Yes | Alt text | Broken links | Low–mid | Most mid-size catalogues |
| Plug in SEO | Bulk editing | Yes | Basic | Checks | Low–mid | Monitoring and issue lists |
| Avada SEO | Templates | Yes | Compression + alt | Checks | Low | SEO plus image work in one |
| SearchPie | Templates | Yes | Compression | Checks | Low | Bundled SEO and speed items |
| JSON-LD for SEO | No | Its whole job | No | No | Mid | Structured data gaps |
The five things no SEO app can fix
- A slow theme on real devices. Core Web Vitals come from field data, and an app that reports them does not change them. That is theme work — see thirteen techniques that work.
- Cannibalisation. When several collections compete for one query, an app cannot choose the winner. True Glory Hair needed seven competing URLs redirected to a single page each, eleven new collections built with real copy, and the navigation pointed only at the winners.
- Thin collection and product content. Templated descriptions rank like templated descriptions. The pages that win are written by someone who knows the product.
- Internal linking. Deep products that nothing links to stay invisible. Category hubs, related products and editorial links are architecture decisions, which is why every post on this blog sits under a topic page and links to the services and case studies it belongs with.
- Content that answers a real query. No app writes the guide that earns the link. That is the work in our SEO & GEO retainer, alongside the AI-visibility side of the same job.
How to choose in five minutes
- Under ~100 products, someone writing titles by hand: no app.
- Hundreds to thousands of products needing consistent metadata: Smart SEO or Yoast.
- Schema is the specific gap: JSON-LD for SEO, and remove the duplicates.
- Nobody is monitoring anything: Plug in SEO for the reports.
- You want image compression in the same tool: Avada or SearchPie, with the speed caveats.
- Rankings are flat despite all of the above: the problem is on the list of five, not in the App Store. The free SEO audit will say which one, and our guide to what a Shopify SEO agency does covers the rest.
FAQ
Do Shopify SEO apps actually work?
They automate real work: structured data, metadata templates across thousands of products, redirect management, broken-link checks and image alt text. They do not write content, fix a slow theme, or decide which of your five competing collection pages should rank.
Which Shopify SEO app is best?
Yoast SEO for teams that know it from WordPress and want editorial guidance; Smart SEO or SearchPie for schema, metadata and image optimisation at a lower price; JSON-LD for SEO when structured data is the specific gap. Run one, not three — duplicate schema is worse than none.
Does Shopify need an SEO app at all?
A small catalogue with hand-written titles and descriptions does not. The apps earn their place at scale — hundreds of products needing templated metadata and schema — or when nobody is available to maintain redirects and alt text by hand.
Why is my Shopify store not ranking even with an SEO app?
Usually one of five things no app touches: slow templates on real devices, thin or duplicated collection content, several pages competing for the same query, an internal link structure that never reaches deep pages, and no content answering what buyers actually search.
