Technical SEO Audit for Online Stores: A Step-by-Step Checklist

Technical SEO audit checklist for online stores, showing an ecommerce storefront, a ticked audit checklist, and a magnifying glass on a dark navy background with violet-purple glow and amber constellation dots

Your online store can have great products and still struggle in search results. If Google can’t crawl important pages, understand your site structure, or index the right URLs, shoppers may never find them.

Theme updates, plugins, catalog changes, and migrations can introduce duplicate URLs, slow pages, and broken redirects. This checklist helps you find those problems on Shopify, WordPress, and WooCommerce stores.

1. Check Whether Search Engines Can Crawl Your Store

Start with your robots.txt file at yourdomain.com/robots.txt. It tells crawlers which parts of your website they can access.

Check that product, category, collection, and blog pages aren’t accidentally blocked. Also make sure Google can access the CSS and JavaScript needed to render your pages.

Shopify generates robots.txt automatically, while WordPress sites may use plugins or custom rules. Review the file after major updates. Use Search Console’s URL Inspection tool to confirm Google can access and render important pages.

2. Review Indexing and Identify Pages That Should Not Be Indexed

Crawling doesn’t guarantee indexing. Google can visit a page without adding it to search results.

In Google Search Console, review the Page Indexing report for issues such as:

  • Excluded by noindex tag
  • Page with redirect or not found (404)
  • Crawled, currently not indexed
  • Discovered, currently not indexed
  • Duplicate without user-selected canonical

Cart, checkout, account, and internal search pages generally don’t need indexing. Focus on valuable product and category pages that are missing. Check for accidental noindex directives before requesting indexing.

3. Inspect Your XML Sitemap

An XML sitemap helps search engines discover important URLs. It doesn’t guarantee indexing, but it gives crawlers a clear list of pages you want them to find.

Shopify typically provides a sitemap at /sitemap.xml. WordPress plugins such as Yoast SEO and Rank Math can generate one too.

Check that the sitemap loads, is submitted in Google Search Console, and includes canonical, indexable URLs. Remove redirected, broken, and noindex pages, and confirm new products and categories appear.

Larger stores may use separate sitemap files for products, collections, and other page types. Review them after catalog changes. Investigate large differences between submitted and indexed URL counts, while remembering that submission doesn’t guarantee indexing.

4. Fix Duplicate URLs and Canonicalization Problems

A product may be accessible through more than one URL, especially when collection paths, filters, or sorting options are involved. For example:

example.com/products/blue-shirt

example.com/collections/shirts/products/blue-shirt

Canonical tags tell search engines which URL is the preferred version.

Check that important pages have appropriate canonical tags, duplicate product URLs point to the preferred URL, and canonical destinations return a successful 200 status. Look for missing or conflicting tags and unnecessary filtered URLs.

Shopify handles many canonical scenarios automatically, but themes and apps can interfere. WordPress stores should review their SEO plugin’s output.

If several pages target similar search terms, use the keyword cannibalization checker tool to identify potential overlap between important landing pages.

5. Test Website Speed and Core Web Vitals

Large images, heavy themes, unnecessary scripts, and third-party apps can slow an online store. Test your homepage, category pages, product pages, and blog posts with Google PageSpeed Insights. Product pages often need extra attention because of image galleries, reviews, and recommendation widgets.

Google’s Core Web Vitals measure three aspects of page experience:

  • Largest Contentful Paint (LCP): How quickly the main content appears. Aim for 2.5 seconds or less.
  • Interaction to Next Paint (INP): How quickly the page responds to interactions. Aim for 200 milliseconds or less.
  • Cumulative Layout Shift (CLS): How much content moves unexpectedly. Aim for 0.1 or less.

Compress images and use WebP or AVIF, lazy-load below-the-fold images, remove unused apps, reduce unnecessary JavaScript and CSS, and reserve space for images and banners. Preload the hero image when appropriate. Prioritize mobile performance.

6. Check Mobile Usability and Responsive Design

Open key pages on different mobile screen sizes and test the shopping experience. Look for text that is hard to read, small tap targets, broken menus, overflowing images, awkward filters, and pop-ups that cover important content.

Make sure descriptions display properly and the add-to-cart button is easy to use. Test the journey from category to product to cart on a smartphone. Google primarily indexes the mobile version, so keep important text, links, and structured data available there.

7. Find and Fix Broken Links and Redirect Errors

Broken links often appear when products are discontinued, category structures change, or URLs are replaced. Crawl the site to find internal 404 links, redirect chains, redirect loops, and server errors.

For removed products, redirect to a genuine replacement or relevant category when appropriate. Don’t send every deleted product to the homepage. Use a 301 for permanent moves, update internal links, and review Search Console’s 404 report for URLs with traffic or valuable backlinks.

8. Review Your Ecommerce Site Structure and Internal Linking

Organize the store so shoppers and search engines can move from broad categories to specific products. A simple hierarchy might look like:

Homepage → Men’s Clothing → Shirts → Blue Cotton Shirt

Link key categories from the main navigation, connect products to relevant categories, and use breadcrumbs. Related-product links should be relevant. Check pagination and find valuable pages buried several clicks deep or receiving few internal links.

9. Validate Structured Data and Product Schema

Product structured data helps search engines interpret product details and can make eligible pages qualify for enhanced search appearances.

Review the markup for product name, image, description, price, currency, availability, and SKU or GTIN where applicable. Include aggregate ratings and reviews only when the page meets Google’s requirements.

Markup must match visible product information. Don’t label an out-of-stock item as available. Check breadcrumb and organization data too. Use Google’s Rich Results Test and Search Console enhancement reports. Test multiple product templates because themes and apps may generate different markup.

10. Check HTTPS, Security, and Website Errors

Make sure your store loads over HTTPS and its SSL certificate is valid. HTTP versions should redirect to HTTPS, internal links should use secure URLs, and important resources shouldn’t load over HTTP. Check for redirect loops and confirm important pages return the correct status codes.

Monitor 500-level errors. Keep WordPress, themes, and plugins updated, and remove unused plugins. Shopify manages hosting and SSL, but custom domains, apps, and external scripts still need review.

Email security matters as well. Authenticate transactional messages such as order confirmations, shipping notifications, and password resets so receiving mail servers can verify that they’re authorized by your domain. Check your configuration with the DKIM checker tool.

11. Create a Regular Technical SEO Maintenance Schedule

Technical SEO needs ongoing attention because products, themes, apps, and URLs change. Use a simple schedule to catch issues early.

Frequency What to Check
Weekly Search Console errors, broken pages, server issues
Monthly Indexing, sitemap status, Core Web Vitals, internal links
Quarterly Full website crawl, canonical tags, redirects, structured data
After major updates Robots.txt, mobile usability, speed, indexing, and redirects

Record each issue, its priority, and its fix date. This helps connect site changes with later organic performance.

Final Thoughts

A technical SEO audit helps you find crawling restrictions, indexing problems, duplicate URLs, slow pages, and broken links that can affect your store’s visibility. You don’t have to fix everything at once. Start with issues affecting important product and category pages, then work through performance, site structure, and structured data.

If your store has recurring technical SEO problems or you’re planning a major update, Nova X Ventures can help identify the issues and prioritize practical fixes. Feel free to contact Nova X Ventures to discuss your store’s SEO requirements and next steps.