Most conversations about SEO focus on the visible stuff: keywords, content, links. Those things matter enormously. But underneath them sits a quieter layer that determines whether any of that visible work pays off at all. It is called technical SEO, and it answers a deceptively simple question: can search engines actually access, understand, and trust your website? At Ohana Digital, we think of technical SEO as the foundation of a house. You can furnish the rooms beautifully, but if the foundation is cracked, the whole thing is compromised.
The reassuring news is that technical SEO is not as intimidating as it sounds. Much of it comes down to a handful of fundamentals that, once handled, tend to stay handled. This post is a practical checklist of those fundamentals, written for business owners rather than engineers, so you can understand what matters, spot problems, and know when to bring in help.
First, understand how Google finds your pages
Before the checklist, it helps to understand the process technical SEO supports. As Google explains in its SEO Starter Guide, Google is a fully automated search engine that uses programs called crawlers to explore the web constantly, looking for pages to add to its index. The journey has three stages. First, Google must crawl your page, meaning its crawler has to be able to reach and read it. Second, it must index the page, storing and understanding it so it can be considered for relevant searches. Third, it serves the page, deciding when and how high to rank it.
Technical SEO is mostly about the first two stages: making sure Google can crawl and index your content without obstacles. If a page cannot be crawled, it cannot be indexed. If it cannot be indexed, it cannot rank, no matter how brilliant the content is. This is why technical health has to come first. Everything else in SEO is built on top of it.
The technical SEO checklist
Here are the fundamentals worth checking, in roughly the order of how essential they are.
Make sure your important pages can be crawled
Your site tells search engines which pages they may and may not access, primarily through a small file called robots.txt. It is surprisingly common for businesses to accidentally block important pages, sometimes a whole section of the site, usually left over from when the site was being built. Confirm that the pages you want found are not being blocked, and that Google is allowed to crawl your content and the resources, like images and scripts, it needs to render your pages properly.
Help Google discover everything with a sitemap
An XML sitemap is a file that lists the important pages on your site, acting as a map that helps search engines discover your content efficiently, especially on larger sites or pages that are not well linked internally. Most modern website platforms can generate one automatically. Submitting it through Google Search Console gives Google a clear directory of what you want indexed.
Confirm your pages are actually indexed
It is one thing for Google to be allowed to crawl your pages; it is another for them to actually be in the index. Google Search Console, which is free, shows you which of your pages are indexed and flags any that are excluded, along with the reason. Reviewing this periodically catches problems before they cost you traffic, pages accidentally marked “noindex,” duplicate content confusing the crawler, or pages Google simply has not gotten to yet.
Get your site speed and Core Web Vitals in order
Speed is both a user experience issue and a ranking factor, and Google measures a specific set of experience metrics called Core Web Vitals. Its documentation on Core Web Vitals defines three: Largest Contentful Paint, which measures how quickly your main content loads and should happen within about two and a half seconds; Interaction to Next Paint, which measures responsiveness and should stay under about two hundred milliseconds; and Cumulative Layout Shift, which measures visual stability, how much things jump around as the page loads, and should stay low. Google highly recommends achieving good Core Web Vitals both for search success and for a better user experience overall. Slow, janky pages frustrate visitors and quietly suppress your rankings at the same time.
Make sure your site works on mobile
Google primarily evaluates the mobile version of your site when deciding how to crawl, index, and rank it. If your site does not work well on a phone, if text is tiny, buttons are impossible to tap, or the layout breaks, you are undermining your entire SEO effort. A fast, readable, thumb-friendly mobile experience is now foundational rather than optional. We have been making this case for years, going all the way back to our post on why your business needs to be mobile, and it has only become more true with time.
Secure your site with HTTPS
Your site should load over HTTPS, the secure protocol indicated by the padlock in the browser. It protects your visitors’ data, it is a trust signal, and browsers increasingly warn users away from sites that lack it. For most sites this is straightforward to set up, and there is no good reason to be without it.
Give every page a clear, logical URL and structure
Clean, descriptive URLs help both users and search engines understand what a page is about. A logical site structure, organized into sensible sections with clear internal links, helps Google understand how your content fits together and helps distribute authority across your pages. Descriptive, hyphen-separated URLs beat strings of random characters every time.
Handle duplicate content and redirects properly
When the same content is accessible at multiple URLs, search engines can get confused about which version to rank. Canonical tags tell Google which version is the primary one. And when you move or remove pages, proper redirects preserve the value of the old URL and prevent visitors from hitting dead ends. Broken links and orphaned pages are small problems individually but add up to a site that feels neglected, to both users and search engines.
How to check your own site
You do not need expensive software to get a sense of your technical health. Google Search Console is free and is genuinely the single most valuable technical SEO tool available; it reports on indexing, mobile usability, Core Web Vitals, and more, straight from Google itself. Google’s PageSpeed Insights lets you test any page’s speed and Core Web Vitals and tells you what is slowing it down. Simply browsing your own site on your phone, clicking around and paying attention to what is slow, broken, or awkward, will reveal a surprising amount.
If these tools surface issues you do not know how to fix, that is completely normal. Technical SEO sits at the intersection of marketing and web development, and some of it genuinely requires a developer’s hands. Knowing that a problem exists is the important first step; fixing it is where a partner often comes in.
How often should you check your technical health?
Technical SEO has a reassuring quality that content and link-building do not: once the fundamentals are handled well, they tend to stay handled for a while. You are not rewriting your robots.txt every week. But “set it and forget it” would be a mistake, because sites drift over time. New pages get added, plugins update, content gets moved, and small problems accumulate quietly until they add up to a real drag on performance.
A sensible rhythm keeps you ahead of that drift without turning technical SEO into a burden. On an ongoing basis, it is worth glancing at Google Search Console every few weeks, because it will proactively flag serious issues, indexing problems, mobile usability errors, security warnings, often before they cost you meaningful traffic. Treat any alerts it surfaces as a prompt to investigate rather than something to dismiss.
On a quarterly basis, a slightly deeper check pays off. Run a few of your important pages through a speed test to confirm your Core Web Vitals are still healthy, since performance can degrade as pages accumulate images, scripts, and third-party tools. Click through your key pages on a phone to make sure the mobile experience still holds up. Look for broken links and pages that have quietly stopped working. Confirm that any new content you have published is actually being indexed.
And there are specific moments that always warrant a technical check regardless of the calendar: after a website redesign or migration, after switching hosts, after adding significant new functionality, or any time you notice an unexplained drop in traffic. These are exactly the moments when technical problems are most likely to be introduced, and catching them early prevents a small oversight from becoming a months-long slump.
The underlying point is that technical health is not a one-time project but a light, ongoing discipline. A little regular attention, mostly reading the alerts a free tool hands you and acting on them, keeps the foundation solid so that everything you build on top of it, your content, your local presence, your paid campaigns, gets a fair chance to perform. Most businesses do not need to think about this constantly; they need to think about it consistently, which is a very different and much more manageable thing.
Why the technical layer is worth the effort
It can be tempting to skip technical SEO because it is invisible. No customer ever complimented a business on its crawlability. But that invisibility is exactly why it is so often the hidden reason a site underperforms. We regularly meet businesses that have invested real money in content and design, yet are struggling in search, and the culprit turns out to be technical: pages blocked from crawling, a site that crawls slowly, mobile problems dragging everything down. Fixing the foundation unlocks the value of everything built on top of it.
Because the technical layer lives so close to how a site is actually built, it is inseparable from good website design. When we build sites, technical soundness is baked in from the start, fast, crawlable, mobile-first, secure, and well-structured, rather than bolted on afterward. A site built right technically gives all your other marketing efforts a fair chance to succeed.
Common technical SEO mistakes
A few recurring problems account for most of the technical trouble we see. The first is accidentally blocking search engines, often a leftover from a site’s development phase that was never removed, quietly keeping pages out of the index. The second is neglecting site speed, letting oversized images and bloated code slow a site to a crawl that frustrates users and depresses rankings. The third is ignoring mobile, treating the phone experience as an afterthought when it is actually the primary version Google evaluates. The fourth is letting broken links, dead pages, and messy redirects accumulate over the years until the site feels unmaintained. And the fifth is never looking at Search Console at all, which means problems go undetected until they have already cost significant traffic. None of these is exotic, and all of them are fixable once you know to look.
The Ohana Digital approach
There is a quiet, foundational quality to technical SEO that fits how we think about our work. The concept of ohana is partly about tending to the things that hold everything else up, the underlying structure that lets a family, or a website, thrive. Technical SEO is that structure for your online presence, and we believe every business deserves a site that gives its content and its investment a real chance to perform.
Whether you suspect something technical is holding your site back, or you simply want the peace of mind of knowing your foundation is solid, we would be glad to take a look. We help businesses across Greater Philadelphia and Honolulu build and maintain sites that search engines can crawl, understand, and reward. Reach out through our contact page, and let us make sure nothing invisible is standing between your business and the visibility it has earned.