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What is Plug In Useful?

Plug In Useful builds a family of Shopify apps focused on organic search growth: Plug In SEO audits stores for technical issues and guides fixes, Plug In AI generates keyword-optimised product and collection descriptions, and Plug In Speed improves Core Web Vitals and page load performance. The company also offers managed Shopify SEO services for merchants who want the work done for them. It reports more than 30,000 Shopify stores using its apps. The business is owned by Layer One Capital Corp.

Key Features

SEO audit and fix

Full store audit with a prioritised list of technical SEO issues plus instructions and videos to resolve them.

Keyword research

Built-in AI keyword research to find terms for product and collection pages.

Meta and structured data tools

Liquid title and meta description templates, bulk template application, and automatic JSON-LD structured data.

Broken link management

Detection of broken links with redirect handling.

Live SERP preview

Google search result preview so you can see how listings appear before publishing.

Plug In AI descriptions

AI-generated keyword-optimised product and collection descriptions.

Plug In Speed

Optimisation of Core Web Vitals and page load performance with speed reports.

Pros & Cons

Advantages

  • The apps integrate directly into the Shopify admin, so audits, fixes and keyword work happen inside the store dashboard.
  • A permanent free tier and a 14-day trial with no credit card let merchants test the tooling before paying.
  • Plans bundle expert consultation time, with a 30-minute SEO call on the Standard plan and above.
  • A long track record on the Shopify App Store with a 4.6 rating across more than 600 reviews indicates an established product.
  • Pricing is monthly through Shopify with no long-term contract, so merchants can cancel from the admin at any time.

Limitations

  • The apps only work with Shopify, so they are not an option for merchants on other platforms.
  • Page scan and AI keyword limits are tied to the plan tier, so larger catalogues need the more expensive Premium plan for unlimited scans.
  • SEO, AI descriptions and speed are sold as separate apps, which can mean multiple subscriptions to cover all needs.
  • There is no public affiliate, partner or referral programme listed on the site.

Use Cases

Shopify merchants who want to find and fix technical SEO issues without hiring an external agency.

Store owners who need keyword-optimised product and collection descriptions written at scale using AI.

Sellers aiming to improve Core Web Vitals and page speed to support rankings and conversions.

Growing stores that want monthly audits and reports to track organic traffic progress over time.

Merchants who prefer a managed, done-for-you Shopify SEO service rather than doing the work themselves.