A website can remain online, load normally for you, and still have serious technical SEO problems. A page may be blocked from crawling, a redirect may point visitors somewhere unexpected, a canonical tag may identify the wrong URL, or a redesign may quietly remove pages that were bringing in organic traffic.
That is why technical SEO deserves a different kind of review. It is less about adding another keyword to a page and more about making sure search engines can discover, understand, access and reliably index the pages that matter to the business.
For Canadian companies, there is another practical consideration: websites often serve several locations, languages, devices and customer groups. A company based in Edmonton may target Calgary, Vancouver, Toronto and customers across Canada from the same domain. That makes URL structure, internal linking, performance, redirects and local signals much harder to ignore.
This checklist focuses on 15 issues worth checking before a technical problem turns into a traffic problem.
1. Important pages are accidentally blocked from crawling
Start with the simplest question: can search engines reach the pages you actually want indexed?
Review your robots.txt file for rules that block important directories, product pages, service pages or resources. A blocking rule can be intentional, but it becomes a problem when a development rule survives a website launch or a broad directive catches URLs that should remain discoverable.
Do not confuse crawling with indexing. A URL can be technically accessible and still be excluded from search for other reasons. Google recommends using URL Inspection to check how it sees a page and whether crawling or indexing is being prevented by factors such as robots.txt, a noindex directive or login requirements.
2. Valuable pages carry a noindex directive
A noindex tag has a legitimate job. It can keep thin utility pages, internal search results or other unsuitable URLs out of search results. The problem starts when the directive appears on pages that generate leads.
Check your major service pages, location pages, product categories, blog articles and other commercially important URLs. This is especially important after migrations, redesigns and staging-to-production deployments, when indexing settings can change without anyone noticing.
If an important page is showing a noindex directive, fix the cause rather than simply removing the tag and moving on. The question is why it was added in the first place.
3. Your XML sitemap is incomplete or misleading
An XML sitemap should help search engines discover the URLs that matter. It should not become a dumping ground for every URL your CMS happens to generate.
Check that the sitemap contains canonical, indexable URLs and that recently published or updated pages appear when appropriate. Remove URLs that return errors, redirect elsewhere, are blocked from indexing or are no longer part of the site's intended structure.
Google recommends submitting a sitemap through Search Console and notes that sitemaps help keep Google informed about changes to a site.
For a large Canadian business website, this is particularly useful after adding new service areas or restructuring hundreds of product, location or resource URLs.
4. Canonical URLs point to the wrong page
Canonical tags are easy to overlook because they rarely affect what a visitor sees. They can still influence which version of a URL search engines treat as the preferred one.
Look for pages whose canonical points to an unrelated URL, the homepage, an old domain or another page with substantially different content. Also check canonical tags after migrations and URL restructuring.
For example, if a Vancouver service page contains a canonical pointing to the Edmonton version, you have created a technical signal that does not match the site's intended architecture.
5. Redirects are masking broken information architecture
A few redirects are normal. Hundreds of them chained together are a warning.
Review important redirects for chains, loops, irrelevant destinations and outdated rules. A page that used to be /services/web-design might now live at /services/website-design; ideally, the old URL should resolve directly to the current equivalent rather than passing through several historical URLs.
Pay particular attention after a redesign. Redirect maps should be based on the old URL inventory, not just the pages someone remembers.
6. 404 errors are appearing on pages that used to matter
Not every 404 is a disaster. Websites naturally accumulate obsolete URLs.
The useful question is whether a broken URL has backlinks, search visibility, internal links or a clear replacement. If it does, decide whether it should redirect to a genuinely relevant replacement or remain unavailable.
Do not redirect every missing page to the homepage simply to make the error count disappear. That can create a poor user experience and a confusing site structure.
7. Core Web Vitals have been treated as a one-time speed test
Performance is not something to check once before launch and forget.
Large images, third-party scripts, advertising tools, analytics, consent platforms, chat widgets and page-builder assets can change performance months after a site goes live. A page that was fast during development can become noticeably slower after several marketing integrations are added.
For businesses where speed is a commercial concern, review loading performance alongside real page templates rather than testing only the homepage. HB Technology Solutions also covers this area through its SEO & Performance Optimization service.
For a deeper look at this subject, see our Canadian guide to Core Web Vitals in 2026 and our analysis of how slow websites can cost customers.
8. Mobile pages are not equivalent to desktop pages
Open the site on a phone and look beyond visual appearance. Are the same important headings, links, structured content and primary information available? Do navigation elements work? Are forms usable without excessive zooming or horizontal scrolling?
Mobile usability is particularly important for local businesses because customers often discover service providers while away from a desktop computer. A technically responsive layout is only the starting point; the mobile version still needs to expose the information that matters.
A practical review should include service pages, contact forms, product pages, menus, booking flows and location pages rather than just the homepage.
9. Internal links leave important pages isolated
Search engines use links to discover relationships between pages, and visitors use them to move through the site. Yet internal linking is often treated as something that happens automatically.
Look for important pages that can only be reached through the sitemap, search function or a deep navigation path. A service page should normally have logical connections from relevant service, industry, location or educational content.
For example, a Canadian business reading about technical SEO may reasonably need information about website design and development, custom WordPress development or domains and cloud hosting. Those relationships should be reflected naturally in the site's internal architecture.
10. Structured data is missing, invalid or describing the wrong thing
Structured data can help search engines understand what a page represents. It is not a guarantee of enhanced search features, and adding every available schema type to every page is not a sound strategy.
Use markup that accurately reflects the visible content and the purpose of the page. Then validate the implementation and inspect representative URLs.
Google recommends testing structured data, checking pages with URL Inspection and ensuring that pages are accessible to Google rather than blocked by robots.txt, noindex directives or authentication.
Common areas to review include Organization, LocalBusiness where appropriate, Article, BreadcrumbList and product-related structured data for qualifying pages.
11. HTTPS works, but the site's URL versions do not agree
Most businesses have moved to HTTPS, but that does not mean the URL setup is automatically clean.
Check the HTTP version, HTTPS version, www and non-www variants, trailing-slash behaviour and any legacy subdomains. The goal is to have one intended canonical version and consistent redirects to it.
Also check internal links. If thousands of internal links still point to an old HTTP or alternate hostname, the site is carrying unnecessary technical clutter.
12. JavaScript is hiding important content or links
Modern websites can depend heavily on JavaScript, but important business information should not become unnecessarily difficult for search engines or users to access.
Review navigation, product information, service descriptions, headings and internal links that depend on client-side rendering. If essential content appears only after a complex script executes, test what search engines can actually retrieve and render.
This matters especially for custom applications, interactive websites and large JavaScript frameworks. A technical implementation can look perfect in a browser while creating a very different crawlable document underneath.
13. Duplicate or near-duplicate URLs are multiplying
Filters, tracking parameters, printer-friendly pages, duplicate category paths and CMS-generated URLs can create several addresses for essentially the same content.
You do not necessarily need to remove every duplicate URL. You do need to understand which URLs are intended to be indexed and which are not.
Review URL parameters, pagination, faceted navigation, category structures and alternate versions of important pages. Then make the indexing and canonical strategy match the actual information architecture.
14. Accessibility problems are being treated as separate from technical quality
Accessibility is not simply a compliance box to tick after SEO work is finished. Semantic headings, labelled form controls, keyboard navigation, readable contrast and meaningful alternative text also affect how people interact with a website.
Canadian organizations also need to understand which accessibility requirements apply to them. Accessibility Standards Canada publishes requirements and guidance covering web content and ICT, while federal accessibility obligations can vary according to the organization and sector.
For businesses serving the public, the practical goal is straightforward: make important information and functions usable by people with different abilities and devices. That usually produces a better website for everyone, not just users relying on assistive technology.
15. You are not monitoring the site after changes go live
This is the issue that makes the other 14 harder to manage.
A technical audit gives you a picture of the site at a particular moment. Websites change. Developers deploy updates, marketers publish landing pages, agencies alter templates, plugins add functionality and redirects accumulate.
Set up a repeatable process for monitoring organic traffic, indexing coverage, important URLs, crawl errors, redirects, performance and major template changes. Search Console should be part of that process, not something you open only after traffic has already fallen.
For companies with significant infrastructure or several systems supporting the website, technical SEO can also overlap with hosting, monitoring and security. HB Technology Solutions provides Managed IT & Cloud Infrastructure for organizations that need ongoing technical support beyond individual SEO fixes.
The problems that deserve attention first
Fifteen checks can sound like a large project, but not every finding deserves the same priority.
Start with anything that prevents important pages from being crawled or indexed. Then investigate major canonical errors, broken redirects, significant performance regressions and structural changes that have removed internal links to valuable content.
After that, work through structured data, accessibility, duplicate URLs, mobile experience and monitoring. The order may change depending on the site, but the principle is consistent: fix the problems that interfere with discovery and access before spending time polishing lower-impact details.
If you operate an online store, the technical review should also include product URLs, category architecture, checkout performance and structured product information. For Canadian retailers, eCommerce Development can address the technical side of Shopify and WooCommerce environments alongside performance considerations.
A technical SEO audit should end with a decision, not a spreadsheet
The purpose of a technical SEO checklist is not to produce a long list of warnings. It is to identify what could stop valuable pages from being discovered, understood, indexed or used effectively.
That distinction matters. A website can have dozens of minor warnings and still perform well, while one incorrect noindex directive or migration error can affect a page that generates a meaningful share of business leads.
For Canadian companies, the most useful audit is therefore the one tied to the site's commercial architecture: which pages generate demand, which locations matter, which customer journeys need to work, and which technical failures could interrupt them.
If your website has recently been redesigned, migrated, expanded into new Canadian markets or experienced an unexplained change in organic traffic, HB Technology Solutions can review the technical foundation and identify practical priorities. Request a Free Project Proposal to discuss your website, SEO and performance requirements.
