If you have run a website for any length of time you have received that email, the one offering two hundred backlinks for a flat fee and delivery by Friday. Most businesses who buy them see nothing happen at all, and a few watch their rankings slide instead, which is a peculiar thing to have paid for.
That gap — between links that genuinely move a site and links that quietly damage it — is what we talk through here, because it is not obvious from the outside and it is where a lot of budget goes missing. So, this is not a piece about what a backlink is, since you know that already. It is about which ones are worth having, and how you can tell before you pay.
What Google is actually counting
A backlink works like a vote, though not every vote carries the same weight, and Google has had two decades to get better at telling them apart. The original PageRank model treated links as a rough measure of trust, on the reasoning that if reputable sites point to you then you are probably worth pointing to, and that principle still holds — what changed is the filtering built around it.
Google’s own link spam policies name paid links, excessive link exchanges and large-scale automated link building as violations, and that page is worth reading in the original because it is the clearest statement of where the line sits. The practical effect is that link volume stopped being a useful target somewhere around 2012. Link quality became the only thing worth measuring.
So, the question is not how many links you have, but rather whether each one would survive being looked at by an actual person.
The three signals that separate a useful backlink from a wasted one
Relevance comes first and it is the one people skip most often. A backlink from a Greek hospitality trade publication to a hotel’s site carries real weight, because the two sit in the same world and the vote makes sense on its face. That same hotel listed in a general directory of four thousand unrelated businesses gets almost nothing, since there is no topical thread for Google to read the vote against.
The second signal is where most of the budget quietly disappears, because what matters is the authority of the linking page rather than the domain it sits on. We say that because a well-known news site does you very little good if your link is parked on a sponsored-content page that nothing else on the internet points to — the domain has authority, that particular page has none, and the link inherits from the page.
Then there is placement, which Google has been reading for years now. A link inside the body of an article, surrounded by relevant text and put there by someone who chose to include it, behaves quite differently from one sitting in a footer or an author bio, because the first required an editorial decision and the second only required a template.
The trade-off is obvious once you see it: links that satisfy all three signals are slow and difficult to earn, while links that satisfy none can be bought this afternoon.
Why domain authority is the wrong number to judge by
Domain Authority is a Moz metric and Domain Rating is an Ahrefs metric, so neither is used by Google, nor was it ever intended to be a purchase criterion — both exist to give SEOs a rough comparative signal, and that is genuinely all they are for.
They get misused constantly, usually because a vendor quotes “DA 50+ links” and it sounds like a specification the buyer can go and verify. But a DA 50 domain with a thin page, no traffic and no topical relationship to your business is not an endorsement of anything, it is just a number that happens to sit above fifty.
Before you accept any DA figure, search for the linking page itself and see whether it ranks for anything at all. We suggest that because a page receiving organic traffic is a page Google has already decided to trust, which tells you considerably more than a third-party score ever will, and don’t forget to check the actual page rather than the homepage it hangs off.
How to audit what you already have
Before you commission a single new link, go and look at what you are already standing on by pulling your backlink profile from Search Console, which is free and, more to the point, is Google’s own view of your links rather than a third party’s approximation of it.
Then sort by referring domain and put three questions to each one: does this site have any plausible reason to mention your business, does the linking page actually get traffic, and would you be comfortable if a client saw it. Most profiles split fairly cleanly into a small number of genuinely good links, a long tail of harmless noise, and now and then a handful that need attention.
That last handful is the one worth looking at closely, and we have seen profiles cleaned up in the nick of time, just before a campaign put real budget behind pages that were already carrying a liability. Doing it properly takes an afternoon, and if you would rather not spend one, it is the kind of work we take on for clients.
The links that actively cost you
Most bad backlinks do nothing at all, since Google simply ignores them and what you lost was the money rather than the rankings, but a smaller group does real damage:
- Paid links that pass ranking signals. Sponsorship is perfectly legitimate business, but the link needs a
rel="sponsored"attribute, because without one you are telling Google an endorsement was earned when it was actually bought. - Clusters of sites built purely to link outward, which are risky precisely because they are connected to each other — when one of them is identified, everything it points to gets identified along with it.
- The same link repeated site-wide across hundreds of footers, which is worth less than a single editorial mention and is trivially easy to spot, since the pattern sits identically on every page.
- Links from sites in unrelated languages or markets with no plausible reason to reference you, where the absence of a reason is itself the signal.
The disavow tool in Search Console exists for genuinely toxic backlinks you cannot get removed any other way, though we would use it sparingly. Most sites that reach for it do not need it, and you can create problems for yourself by disavowing links that were doing no harm at all.
Cleaning up is the easy half, though. Setting expectations is the part most vendors skip.
What to expect, and over what period
Link acquisition is the slowest part of our SEO work and anyone telling you otherwise is selling volume, because a newly earned backlink has to be crawled, then assessed, and only then does it show up in ranking movement — a sequence measured in weeks rather than days.
What sets your own timeline is your starting profile, how competitive your target queries are, and how much genuinely linkable material your site publishes, and it is that last one most businesses ignore. Consistent content that other people actually want to cite does more for a link profile over a year than any outreach campaign, simply because it keeps working while you are busy doing something else.
Where good backlinks actually come from
None of this is a secret, which is exactly why it works — original data from your own operations, industry commentary from someone with a name and title, tools or calculators that solve one narrow problem well, and real relationships with trade publications in your sector.
None of it scales the way a link package promises to, and all of it survives scrutiny, which over a few years turns out to be the only test that matters.
Frequently asked questions
How many backlinks does a site need to rank?
There is no threshold, because ranking depends on how competitive the query is and on the relevance and authority of your links relative to the pages you are competing with. In competitive queries it is common to see a page with a handful of strong, relevant links outrank one carrying hundreds of weak ones.
Are nofollow backlinks worthless?
Not at all. Since 2019 Google has treated nofollow as a hint rather than a directive, so these links can still carry some weight, and they drive referral traffic and brand visibility regardless of what they pass. Treat them as valuable but secondary.
Should we buy backlinks?
Buying links that pass ranking signals violates Google’s spam policies and puts your site at risk, which is a poor trade for the money saved. Paid placements are fine when marked with rel="sponsored" — the transaction was never the problem, the concealment is.
How do we know if a link is hurting us?
The usual pattern is a sudden ranking drop alongside a spike in low-quality referring domains in your backlink profile. Check Search Console for manual actions before assuming the worst, though, since most suspected penalties turn out to be ordinary algorithmic movement or a technical fault elsewhere on the site.
Can we build links without outreach?
Partly, yes. Publishing genuinely referenceable material — original data, sector analysis, useful tools — earns links passively over time, because other people cite it without being asked. Most effective programmes end up combining both.
Before you commission any link building
Ask whoever is selling to you two questions: which specific sites, and why those ones. Someone who can answer both is doing editorial work and will happily show you the reasoning, while someone who answers with a tier and a volume is selling you exactly the thing Google has been filtering out since 2012.
If you would like a look at your current backlink profile and an honest read on what it is actually worth, get in touch with us and we will go through it together.