On-page vs off-page SEO: what each covers and where to start

On-page vs off-page SEO is the difference between what you do on your own website, such as content, titles, structure, internal links and page speed, and what happens elsewhere that signals trust in it, such as links from other sites, mentions, reviews and your business profile. On-page work comes first for most companies, because off-page signals only help pages that already deserve to rank.

Last updated: 31 October 2026.

This guide explains what on-page and off-page SEO each include, where technical SEO fits, how they work together, which to prioritise at each stage of a site’s life, and how to build off-page signals without the shortcuts that get sites penalised. It is written for marketing leads and founders who want to understand how their budget should be split.

At Odduel, a creative and technology agency in Barcelona and São Paulo, our digital marketing service covers SEO from the site’s structure and content to the work that earns links and mentions. Our own site publishes in six languages, each with its own addresses, titles and keywords researched for that market, so we deal with both sides every week.

In short: on-page SEO makes each page clearly the best answer to a search: the right topic, a clear title and headings, useful content, internal links and a fast, accessible page. Off-page SEO builds the reputation that tells search engines other people trust you: links from relevant sites, mentions, reviews and a consistent business profile. Technical SEO keeps the site crawlable underneath both. Start on-page, fix technical blockers, then earn off-page signals with work worth citing.

What is on-page SEO?

On-page SEO covers everything on your own pages that helps search engines understand them and helps people find them useful. You control all of it.

• Search intent and topic: one clear topic per page, matched to what people searching for it actually want.
• Titles and meta descriptions: a unique title that leads with the main term, and a description that makes people want to click.
• Headings: one H1, then headings in order that reflect the questions the page answers.
• Content: complete, accurate and original, written for the reader, with facts that can be checked.
• Internal links: links between related pages, with descriptive link text, so both visitors and crawlers can follow your topics.
• Images: descriptive file names, alt text, modern formats and sizes that do not slow the page.
• Addresses: short, readable URLs; our guide to SEO-friendly URLs covers how to write them.
• Structured data: markup that describes the page, such as an article, a product or a set of questions, so search engines can read it reliably.

What is off-page SEO?

Off-page SEO covers signals that come from outside your site. You influence them, but you do not control them.

• Links from other sites, especially relevant, respected sites in your field. They act as references.
• Mentions of your brand in articles, directories, lists and discussions, even without a link.
• Reviews and ratings on platforms your customers use.
• Your business profile, such as a Google Business Profile, with consistent name, address and contact details.
• Social and community presence that brings attention to your content, even though social links themselves carry little direct weight.
• Digital PR: research, data, tools or opinions that journalists and writers want to cite.

Where does technical SEO fit?

Technical SEO is sometimes counted as part of on-page work and sometimes treated separately. It covers the foundations that let search engines crawl, render and index your site: a sitemap, sensible robots rules, canonical tags, correct redirects, page speed, mobile layout, security and, for multilingual sites, hreflang. Without it, neither on-page nor off-page work can do its job.

On-page vs off-page SEO side by side

The table compares the two, with technical SEO alongside because it supports both.

	On-page SEO	Off-page SEO	Technical SEO
Where it happens	On your own pages	On other sites and platforms	In the site’s code and server
Who controls it	You, fully	Others, influenced by you	You, fully
Main elements	Intent, titles, headings, content, internal links, images, structured data	Links, mentions, reviews, business profile, digital PR	Crawling, indexing, speed, mobile, redirects, hreflang
How fast it shows results	Weeks, once pages are recrawled	Months, as signals build up	Days to weeks once fixed
Main risk	Thin or duplicate content, unclear intent	Paid or manipulative links, penalties	Pages blocked or missing from the index
Typical owner	Content, SEO, design	PR, partnerships, SEO	Development, SEO

How do on-page and off-page SEO work together?

Search engines look for the page that best answers a query and comes from a source people trust. On-page SEO makes your page a strong answer; off-page SEO makes your site a trusted source. A page with excellent links but weak content rarely holds its position, and an excellent page on a site nobody cites can struggle on competitive searches.

Internal links connect the two. When other sites link to one of your pages, internal links pass some of that value to related pages, so a well-structured site makes better use of every link it earns.

Which should you prioritise?

The right split depends on the state of your site and how competitive your searches are.

1. New or small site: almost all on-page and technical. Get the structure, the key pages and the basics right; a few relevant links from partners, directories and your business profile are enough at first.
2. Established site with weak pages: on-page first. Improve or merge thin pages, fix titles and headings, add internal links. Links to weak pages are wasted.
3. Strong pages, competitive searches: more off-page. When your pages are as good as those ranking above you, the difference is often reputation, and that is where digital PR and partnerships help.
4. After a redesign or migration: technical first. Redirects, indexing and speed must be right before anything else matters; our guide to website redesign and SEO explains what to check.

For a wider view of how SEO fits with the other channels, see our SEO guide for 2027.

How do you build off-page signals safely?

Search engines are explicit that links bought or exchanged to manipulate rankings break their rules. Google’s spam policies list link schemes among the practices that can lead to lower rankings or removal from results. Safe off-page work earns attention rather than buying it.

• Publish things worth citing: original research, useful tools, clear guides and real project work.
• Use relationships you already have: suppliers, partners, clients and associations that can link to you naturally.
• Keep listings consistent in the directories and platforms relevant to your sector and markets.
• Ask happy customers for reviews, and answer reviews, good and bad.
• Pitch journalists and writers with expertise, data or comment on topics they cover.
• Mark paid placements properly: sponsored links should carry the attributes that tell search engines they are paid.

Avoid link packages sold by volume, groups of sites built only to link, and exchanges arranged purely for rankings.

How do on-page and off-page SEO work across European markets?

Selling in several European countries multiplies both sides of the work. On the page, each language needs its own keyword research, because people in France, Germany or Spain do not search with literal translations of English terms, plus translated addresses, titles and descriptions, and hreflang tags that tell search engines which version to show in which market. A translated page that keeps the English slug and an untranslated title rarely ranks well.

Off the page, reputation is also local. Links and mentions from sites in each market, listings in national directories and reviews on the platforms people use in that country carry more weight there than links from elsewhere. A company that ranks well in one country often has to build its reputation again, market by market, rather than relying on the links of its main site.

How do you measure each?

• On-page: rankings and clicks for each page’s main terms in Search Console, click-through rate from results, time on page and the share of visitors who go on to an enquiry or sale.
• Off-page: the number of relevant sites linking to you, new mentions, review volume and rating, and branded searches over time.
• Technical: pages indexed versus pages published, crawl errors, Core Web Vitals and mobile usability.

If you are choosing someone to do this work, our guide on how to choose an SEO company lists the questions to ask, and our article on digital marketing agency pricing explains how SEO work is usually priced.

Questions people ask

Start with your own pages and the technical foundations, then earn the links and mentions that make your site a trusted source. See how our digital marketing service handles both sides, or tell us about your project and we will look at where your site stands.