Can linking to external sources be harmful?

Anyone who creates content for a website will face this situation sooner or later: you quote or use information from an external source. To be fair—and in some cases to avoid copyright issues—it’s advisable to link to that source. But can linking to another website harm your own SEO or your reputation? What are the potential consequences? We’ll discuss that in this blog post.

Links are crucial, not only for traditional search engines like Google but also for the latest generation of AI search engines. The number and quality of relevant links pointing to a page help determine how and where a website is displayed.

To give a (hypothetical) example: You’ve written a good article in your field of expertise about the latest method for measuring sugar in liquids. Subsequently, your article and the insights it contains are linked to by companies and individuals on other websites, shared on social media, and further disseminated and cited. This gives your article tremendous value, which is linked to it behind the scenes.

But what about the other side of the coin? What happens when you link to someone else?

Reasons Not to Link

There are a number of reasons not to link to a website; often, people refrain from doing so out of fear that it will damage their own SEO reputation. However, in many cases, this is an overreaction. Linking to a website that’s known as a reliable source—in which case you’re already mentioning or referencing its content—doesn’t harm your domain’s reputation. Especially if you include the proper source attribution in the link. In many cases, this can even have a positive effect for both sides.

However, if you find that the source is very unreliable, doesn’t seem trustworthy, or is otherwise completely irrelevant, it’s obviously not a good idea to link to it.

Another commonly cited reason is that you don’t want to give a competitor or an external party “free SEO value.” However, this is a misconception. Being too cautious can even lead to resentment among competitors or partners with whom you might want to collaborate in the future.

Reasons Why You Should Link After All

1. Give and Take on the Open Web

Many websites take a selfish approach: they use only internal links and refuse to include outbound links unless there’s a direct quid pro quo.

Search Engine Land summed this up aptly with the motto: “You can’t demand the click if you won’t give the link.” You can’t expect readers or search engines to discover and appreciate your content if you yourself refuse to participate in the internet’s ecosystem.

The open internet is based on connections. Without links, the web simply wouldn’t exist. If you run a content platform, a blog, or a news site, sharing valuable sources is part of maintaining a healthy and open online presence.

2. Build Trust with Google and AI (E-E-A-T)

Search engines don’t just look at who links to you, but also at the context of the pages you link to. Under Google’s latest quality guidelines (E-E-A-T: Experience, Expertise, Authoritativeness, and Trustworthiness), citing sources plays a major role.

When you back up statements or figures with links to scientific studies, official agencies, or reputable news sources, Google and AI models better understand what your article is about. This demonstrates that your content is thoroughly researched and that you’re transparent about your sources of information.

3. A Better Experience for Your Readers (UX)

Ultimately, you’re writing content for your visitors, not just for search engines. When a reader comes across an interesting fact on your website, they sometimes want to learn more details. By providing a clear link to the original source, you’re directly helping the reader. This enhances the user experience and builds trust in your brand or company.

The Public Web

Is linking to external sources harmful? No, not in 99% of cases. What’s more, it’s an essential part of a well-researched, reliable, and user-friendly article.

By transparently linking to valuable sources, you’re not only helping your readers but also signaling to search engines and AI models that your content is fact-based. As long as you steer clear of spam websites and broken links, external links are a valuable asset for your website hosting and your domain’s reputation!