An outbound link is easy to add and easy to forget. Once it is published, it sits on the page and keeps pointing at whatever the destination becomes. This article covers what Google’s documentation says about linking out, when it says to qualify a link, and what a reasonable review routine looks like. Where the reading is ours and not Google’s, we say so.
Why Google cares about the links you publish
Google’s link best practices open with the basics: Google uses links as a signal when determining the relevancy of pages and to find new pages to crawl. So links serve two purposes in its description, discovery and context. The anchor text, the page says, tells people and Google something about the page you are linking to.
The same page is reassuring about external links. It says Linking to other sites isn’t something to be scared of
, and that external links can help establish trustworthiness, for example by citing your sources. It asks you to link out when it makes sense and to give readers context about what to expect. The documentation does not say how many outbound links a page should have; for links in general it says there is no magical ideal number, and that if you think it is too much, it probably is.
What a link on your page says about its destination
The wording below is our reading, not Google’s. A link is a recommendation made in your name: a reader who clicks it assumes you would stand behind where it goes. Google’s guidance supports part of that. It describes nofollow as the choice for when you do not trust the source and would rather not give it some of your reputation, with an example of writing a response to a story that badmouths something you like. The implication, which we draw ourselves, is that an unqualified link is one you are content to be associated with.
Our reading: the page owner carries some responsibility for the destination, including after it changes.
Sponsored, ugc and nofollow: what Google says each is for
Google’s guide to qualifying outbound links sets out three values and says that regular links you expect Google to fetch and parse need no rel attribute.
sponsored: for advertisements and paid placements. Google saysnofollowwas previously recommended for these and is still acceptable, though sponsored is preferred.ugc: for user-generated content such as comments and forum posts. Google adds that you might remove it from links posted by members who have consistently made high-quality contributions. Its guide to preventing user-generated spam also suggestsnofolloworugcon all links in untrusted content, since spammers are often motivated by leaving a link.nofollow: when the other values do not apply and you would rather Google not associate your site with, or crawl the linked page from, your site.
Several values can be combined, as in ugc nofollow. Links marked this way will generally not be followed, but the linked page may still be found through other means such as sitemaps or links from other sites. The attributes apply to anchor elements Google can crawl.
Why the paid case is stated so firmly comes from the spam policies. Link spam is defined as creating links to or from a site primarily to manipulate search rankings, which includes exchanging money, goods or services for links. The same section says buying and selling links is a normal part of the web’s economy for advertising and sponsorship, and that it is not a violation as long as the links are qualified with nofollow or sponsored. Note the direction, to or from: the policy applies to links your site publishes, not only to ones it receives. Its examples also include requiring a link as part of terms of service or a contract without allowing the content owner to qualify it, which is a reminder that qualification is the linking site’s call.
Links that go stale or change hands
The linking pages we read are about how to write a link; they do not address what happens to one after publication. That gap is where older content collects problems. A link that was a sensible citation at the time may now point at a page that was removed, moved, or hosted by someone else. Our reading is that this is the main hazard for archives and long-lived guides, because nobody is looking at the destination.
Google’s spam policies describe expired domain abuse: an expired domain name purchased and repurposed primarily to manipulate rankings by hosting content that provides little to no value to users. We make no claim about how often this affects any particular site, and it concerns the buyer of the domain, not the sites that linked to it. But it illustrates why a link is only as stable as the domain behind it. We cover the mechanics in expired domains in outbound links, and the related trap of treating a blocked check as a dead link in false broken links caused by bot protection.
Relevance: does the link fit the page?
Google’s guidance on anchor text asks for text that is descriptive, reasonably concise and relevant to both the page it is on and the page it links to. It also says to attend to the words before and after a link, because the surrounding sentence gives context, and not to chain links together.
Our reading: two questions fall out of this. Does the anchor text still describe the destination as it is today? And does the destination still belong on this page, given what the page is about? A link can pass the first test and fail the second, for instance a cited resource that has become a different kind of site.
A review routine, as we read it
Google does not publish a routine for reviewing outbound links, so this is our reading of how to apply its guidance, not a Google procedure.
- List the outbound links, with the anchor text and the page each sits on.
- For each, check where it leads now: whether it resolves, redirects or has changed character.
- Check whether the link is qualified correctly: paid placements as
sponsored, user contributions asugc, and anything you would rather not be associated with asnofollow. - Ask whether it still fits the page and what the anchor text promises.
- Decide: keep, qualify, update or remove. Record why.
Repeat it. A link review is a snapshot, which is the point of our piece on why one-off link audits go stale.
Where this fits at Cultured Digital: links you publish and links you earn
Internal linking and architecture are part of our technical SEO service, and outbound links are the other half of how a page is linked. On the authority side, our Authority and Link Building service looks for relevance, real editorial standards and context that makes sense, and avoids networks, schemes and irrelevant placements. Reviewing past link building is one of the situations it fits, and analysis first is where that begins.
One of our tools covers the outbound side. Link Signals reads outbound links with their anchor text, checks where each one leads now, uses domain registry data and public blocklists, and adds a model-based judgment of whether a link fits. Findings judged only by keywords or by the model are marked “Needs review”, so a person makes the call.