Topical relevance determines whether an expired domain's backlinks help you or become dead weight. A domain with strong links in a different niche from your intended use is worth far less than metrics alone suggest. Buying a domain with 50 referring domains is only a win if those links come from relevant sites and anchor text that aligns with your topic.
Links from sites on the same topic are easier to justify than links from unrelated sites, and that matters most on an expired domain, because its past audience and link profile come attached to it. If you misalign the domain's new content with its old links, the likely outcome is discounted link value. If the new site is also low-value content built to manipulate rankings, it can run into Google's expired domain abuse policy.
What topical relevance means for link value
Topical relevance is the match between the anchor text and linking sites of an old domain's backlinks and the topic you plan to use the domain for. A domain that was used for lawn equipment with inbound links from gardening blogs and anchor text like "best leaf blower" carries link value for a gardening or tools site. That same domain carries little value for a finance blog.
The link value depends on two layers of relevance. First, the linking site must be about the same topic or a related one. A backlink from a general gardening blog to a lawnmower site is topically relevant. A backlink from a cryptocurrency forum to the same lawnmower domain is not. Second, the anchor text must signal the link's topic. "Best lawn care tips" is relevant to gardening; a keyword-stuffed or generic anchor like "this site" is not.
Google does not publish how it weighs a link, but the linking site, the anchor text and the content of the destination page are the obvious things to look at. On an expired domain with old links, a mismatch between the old anchors and what you publish next suggests either that the link is off-topic now, or that the domain's history is being used without continuing the same purpose.
Why link value is tied to topic
A link from a gardening blog to a lawnmower site makes sense; a link from a crypto exchange to the same site does not, so it is reasonable to expect the second kind to count for less.
A topic change shows the domain has changed hands and purpose. Google's expired domain abuse policy, added in March 2024, targets buying domains and repurposing them primarily to manipulate rankings with content of little value to users. Using an old domain for a new, genuinely useful site is not covered by it. To stay clear of trouble and keep the links useful, keep the new use in the same topic zone as the old one, or start fresh. Using a domain from one topic for a related but distinct topic requires careful handling.
Measuring the match: archive titles, anchors, and Topical Trust Flow
Before buying an expired domain, audit its topical relevance. Start with the Wayback Machine and read page titles and content from the domain's history to identify its primary topic and stability.
Next, examine the anchor text of incoming links using Ahrefs, Majestic, or Semrush. If most anchors are "best pruning shears" and "garden tools," the links are topically tight. If scattered across unrelated keywords, the network is loose.
Majestic's Topical Trust Flow metric breaks down link quality by topic, showing whether trust is concentrated in one or two topics (good for coherence) or scattered across many (bad). If the highest category matches your intended topic, you are in good shape.
Three scenarios: same topic, adjacent topic, unrelated
Same topic
A domain used for five years as a "DIY gardening tips" blog that you intend to continue as a gardening resource site is ideal. The links, anchor text, archive, and your new use are aligned. You can inherit the link value with minimal risk.
Adjacent topic
A domain used for "gardening supplies" that you plan to use for "urban agriculture" is adjacent. The topics overlap, and the link networks (gardening blogs, ag organizations, etc.) overlap. A genuinely useful site like this is not what Google's policy targets, but you should expect some discount in link value. Links mentioning "roses" or "pruning" are less directly relevant to "urban farming," but they are not off-topic.
To make this work, write content that bridges both categories. A piece on "growing vegetables in containers," for example, sits in both "gardening" and "urban ag" zones. This gives the old links a plausible connection to your new focus.
Unrelated topic
A domain used for financial services that you want to use for a blog about cryptocurrency is unrelated. The link networks are different, the audience is different, and anchor text will not match. The old links are unlikely to help, and if the new site is low-value content built to exploit the domain's history, it is the kind of use Google's policy describes. Avoid this unless you have another reason to want the domain; the link value is likely to be negligible.
What happens with a mismatch
If you buy a domain and use it for an unrelated topic, several things can happen:
First, the old links are likely to be discounted. They still exist, but they probably do little for your new content because the anchor text and linking sites no longer make sense.
Second, you take on risk. If the new use looks like expired domain abuse, or if the domain has a history of spam or penalties that you cannot see, that can follow you. Manual actions are visible only to the verified owner in Search Console, so there is no public way to check before buying.
Third, you waste money. A domain bought for its link metrics may deliver little to no ranking benefit if the links are off-topic. You pay the acquisition cost but receive no link value.
The safest approach is to avoid this situation entirely. If a domain's past topic does not match your intended use, buy a different domain.
Decision examples
Example 1: You find a domain, previously about "kitchen knives," with 40 referring domains and DR 35. You want to build a "cooking techniques" site. The topics are adjacent. Check the Topical Trust Flow: if "cooking," "food," or "kitchen" are the top categories, proceed. If the top categories are unrelated, skip it.
Example 2: A domain was about "home insurance" for eight years, with 60 referring domains and DR 42. You want to build a "personal finance" site. Finance-related sites likely linked to it with anchor text like "home insurance rates." That network is adjacent to personal finance. Write content that covers both (home insurance as a personal finance topic) to bridge the gap. This can work.
Example 3: A domain about "Linux tutorials" with 30 referring domains is offered at a good price. You want to build a "cybersecurity tools" site. The audiences and topics are different (Linux systems vs. security) but adjacent in the tech space. Tech sites might link to both. If the anchor text is technical and general ("best Linux resources"), it has some relevance. Proceed cautiously and write content that covers the overlap (securing Linux systems, for example).
When evaluating domains, use hunter.domains' archive of ended domains to review a domain's history before buying, and see how hunter.domains scores and filters domains. It reads Wayback Machine history for page titles, script and content, and flags topic changes. Combining archive review with your own backlink analysis helps you avoid costly mistakes.
Frequently asked questions
Should I buy a strong domain from a different niche?
No. A domain with high metrics but off-topic links is a poor investment. The metrics (DR, referring domains) describe the past. They may do little for you if you change the topic. You risk paying for authority you cannot use. A new domain with no links but on-topic potential for your niche is a better choice.
How do I check topical relevance?
Check the Wayback Machine for the domain's past content and topic stability. Pull the domain into a backlink tool and examine the anchor text and linking sites. Look for Topical Trust Flow metrics if available. Ask yourself: do the domains linking to this one align with my niche, and do their anchor texts describe content I will publish? If the answer is yes, the domain is topically relevant. If no, it is not.
