New to SEO? The on-page versus off-page distinction is one of the first concepts you will encounter — and one of the most misunderstood. Getting both right is essential for competitive rankings. But knowing which to focus on first can save you months of misdirected effort.

Quick Answer: On-page SEO covers everything you optimise directly on your website — content quality, title tags, headings, page speed, and internal structure. Off-page SEO covers signals that come from outside your site — primarily backlinks from other websites. Both matter, but on-page is always the foundation you must build first.

What does on-page SEO include?

On-page SEO includes every ranking signal that lives directly on your website and is entirely within your control. If you can edit it yourself without needing another website's cooperation, it is an on-page factor.

The main on-page SEO elements are:

  • Title tags — the clickable headline shown in search results, ideally 50–60 characters with your primary keyword near the front
  • Meta descriptions — the descriptive text shown beneath your title, ideally 150–155 characters written to earn the click
  • Heading structure (H1, H2, H3) — the hierarchy of your content that helps both users and Google understand the page's organisation
  • Content quality and depth — how thoroughly and accurately your content answers the searcher's question
  • Keyword usage — natural integration of relevant terms without over-stuffing — check with our keyword density checker
  • Internal links — links between your own pages that distribute authority and aid navigation — check with our internal link checker
  • URL structure — clean, descriptive URLs that reflect the page content without unnecessary parameters
  • Page speed and Core Web Vitals — how fast and stable your pages are, measured by Google's page experience standards
  • Mobile friendliness — how well your pages work on smartphones, which is how Google primarily evaluates sites
  • Schema markup — structured data code that explicitly tells Google what type of content is on the page
  • Image alt text — descriptive text for every meaningful image, helping both search engines and screen readers

Is page speed an on-page SEO factor?

Yes — page speed is a core on-page technical SEO factor. Google officially uses Core Web Vitals (LCP, INP, and CLS) as ranking signals. A page that loads slowly puts itself at a disadvantage in competitive queries where faster competitors deliver equivalent content more quickly. Test yours with our page speed tool.

What does off-page SEO include?

Off-page SEO refers to signals that originate outside your website. These signals tell Google how the rest of the internet perceives your site's authority, relevance, and trustworthiness — information Google cannot get from your site alone.

The main off-page SEO elements are:

  • Backlinks — links from other websites pointing to yours (the dominant off-page signal)
  • Referring domain quality — not just the number of links, but the authority and relevance of the sites linking to you
  • Brand mentions — when other sites mention your brand name even without a clickable link
  • Local citations — mentions of your business name, address, and phone number across directories and map platforms
  • Reviews and ratings — on Google Business Profile, Trustpilot, industry platforms, and other review sites
  • Social signals — shares and engagement on social platforms (an indirect signal rather than a direct ranking factor)

Are backlinks still the most important off-page SEO signal in 2026?

Yes — backlinks remain the strongest off-page ranking signal by a considerable margin. A link from a trusted, relevant website acts as an editorial vote of confidence in your content. Quality matters far more than quantity. Ten genuine editorial backlinks from respected publications in your niche will consistently outperform one hundred links from unrelated low-quality directories.

Where does technical SEO fit in this picture?

Technical SEO is sometimes described as a third category sitting beneath on-page SEO. It covers the infrastructure that enables both on-page and off-page signals to work — crawlability, site architecture, HTTPS security, JavaScript rendering, and site speed.

Think of it this way: technical SEO is the foundation, on-page SEO is the building, and off-page SEO is the reputation of that building among its neighbours. A broken foundation undermines everything above it regardless of how good the construction is. Use our broken link checker to identify technical issues that may be quietly limiting your rankings.

Which should you focus on first — on-page or off-page SEO?

Always fix on-page SEO before pursuing off-page links. Building backlinks to a poorly optimised page is like sending people to a shop with no signs, broken shelves, and nothing in stock. The traffic arrives but does not convert into rankings because the page cannot turn that link equity into relevance signals effectively.

The recommended priority order:

  1. Technical foundation first — ensure Google can crawl and index every page without errors
  2. On-page optimisation — ensure each page targets the right keyword with the right content structure
  3. Content quality — ensure your content is genuinely the best answer to the search query
  4. Internal linking — ensure your pages link to each other strategically to distribute authority
  5. Off-page link building — now amplify the authority of well-optimised pages with external backlinks

Can you rank without any backlinks?

Yes — for low to medium competition keywords, strong on-page optimisation and genuine topical authority can rank pages without any backlinks. This is especially true for long-tail, informational queries with limited competition. For high-competition head terms like "car insurance" or "personal injury lawyer", backlinks remain essential to compete with deeply established sites.

What are the most important on-page factors to get right first?

If you have limited time, prioritise these three on-page elements above all others:

  1. Search intent match — your content format, depth, and angle must match exactly what the searcher wants. Someone searching "how to fix broken links" wants a step-by-step guide — not a product page or a definition article.
  2. Title tag optimisation — include your primary keyword naturally within 60 characters. This is the first signal both Google and searchers read when evaluating your page's relevance.
  3. Content completeness — answer the question more thoroughly than any competing page. A page that leaves searchers needing to go back to Google and search again is Google's clearest quality failure signal.

Summary

On-page and off-page SEO work together — neither alone is sufficient for competitive rankings:

  • On-page SEO = what you control on your website: content, titles, speed, structure, internal links
  • Off-page SEO = signals from outside: backlinks, brand mentions, citations, reviews
  • Technical SEO = the foundation that makes both work: crawlability, HTTPS, site architecture
  • Fix on-page before pursuing off-page — the order matters significantly for results
  • Long-tail keywords can rank on on-page alone; competitive head terms always require strong off-page support too

Continue reading: How do you do an SEO audit step by step?