The five technical SEO fixes that actually move the needle

Not a list of 342 issues. Five things that reliably matter, and how to tell whether they are broken.

Technical SEO gets treated as an enormous checklist. In practice, a small number of problems account for most of the damage. Here are the five we see most often, in order of impact.

1. Pages set to noindex by accident

A staging tag that shipped to production will silently remove a page from search. It is the most expensive mistake on this list because nothing looks broken.

How to check: fetch the page and read the robots meta tag. If it contains noindex, decide deliberately whether that is intended.

2. Missing or duplicated titles

A missing title means the search result shows a URL. Duplicate titles across several pages make them compete with each other for the same query.

How to check: collect every <title> across the crawl and group them. If two pages share one, they need distinct titles.

3. Thin or empty descriptions

Descriptions do not affect ranking directly, but they decide the click. Google truncates around 155–165 characters, and rewrites descriptions it considers unhelpful.

How to check: anything shorter than 70 characters or longer than 165 is worth rewriting. Missing entirely is worth rewriting first.

4. Broken internal links

A link returning 404 wastes crawl budget and dead-ends visitors. Internal links are entirely within your control, which makes them the easiest win on this list.

How to check: request every internal URL found in the crawl and record any response of 400 or above.

5. No structured data on key pages

Schema is not a ranking factor by itself, but it removes ambiguity about what a page is — for search engines and for AI systems grounding answers in your content.

How to check: look for application/ld+json blocks. LocalBusiness on the homepage, Service on service pages, FAQPage where you genuinely answer questions, Article on posts.

What about Core Web Vitals?

They matter, but they are usually a development project rather than a content fix, and field data takes weeks to reflect a change. Fix the five above first — they are cheap, reversible and measurable.