Adverse SEO: When Competitors Attack Your Rankings

Adverse SEO is the practice of deliberately using manipulative tactics against a competitor’s website to damage their search rankings. It typically involves building large volumes of toxic backlinks to a target site, scraping and duplicating content across the web, or fabricating negative signals designed to trigger a Google penalty. It is not theoretical. It happens, and when it does, it can be genuinely damaging if you are not prepared for it.

The good news, if there is any, is that most adverse SEO attacks fail against well-established sites with strong link profiles and clean technical foundations. The risk concentrates at the edges: newer domains, sites in hyper-competitive niches, and businesses that have never audited their backlink profile. If that describes you, this is worth reading carefully.

What Counts as Adverse SEO?

The term covers a range of tactics, but they share a common intent: to cause Google to devalue or penalise a competitor’s site. The most common forms are worth understanding individually, because the defence for each is different.

Toxic link building. Someone points thousands of spammy, low-authority, or explicitly penalised links at your domain. The theory is that Google will interpret this as a sign you have been buying links or engaging in manipulative link schemes, and will penalise you accordingly. In practice, Google is much better at ignoring these links than it used to be. But volume attacks from certain link types, particularly those associated with known spam networks, can still cause problems.

Content scraping and duplication. Your content is copied and republished across hundreds of low-quality sites. The goal is to dilute your originality signals and, in some cases, to get the scraped versions indexed before your original. This is harder to execute effectively than it sounds, but it does happen in content-heavy niches where publishing velocity is high.

Fake negative reviews. While this does not affect organic search rankings directly, a coordinated campaign of fake negative reviews on Google Business Profile can damage your local search visibility and click-through rates. It also bleeds into brand search behaviour, which does have downstream SEO effects.

Crawl budget manipulation. Automated bots are used to hammer your site with requests, consuming your crawl budget and potentially slowing your server response times. For smaller sites on shared hosting, this can affect how frequently Googlebot visits and indexes your pages.

Anchor text manipulation. Links are built to your site using exact-match anchor text for competitive keywords you are not targeting, or using anchor text that is explicitly spammy. The intent is to make your link profile look manipulated, triggering algorithmic or manual penalties.

If you want to understand how these tactics sit within the broader landscape of SEO risk and strategy, the Complete SEO Strategy hub covers the full picture, from technical foundations to link building to competitive positioning.

How Likely Is It That Someone Is Actually Attacking You?

Honestly, less likely than most people assume. When I see a client panic about adverse SEO, nine times out of ten the backlink profile problems they are looking at are self-inflicted: old link building campaigns, directory submissions from 2012, or links from sites that have since been penalised. The instinct to blame a competitor is understandable, but it is usually wrong.

That said, I have seen genuine adverse SEO campaigns in high-margin, high-competition verticals. Finance, legal services, and certain e-commerce categories are the usual suspects. The economics make sense in those niches: if knocking a competitor off page one is worth tens of thousands of pounds a month in captured revenue, someone will try it. I have sat in client meetings where the evidence was unambiguous, with hundreds of links appearing overnight from domains that existed purely to distribute spam, all pointing at one specific page of a competitor’s site.

The frequency of genuine attacks is lower than the SEO industry sometimes implies. There is a small but real incentive for tools and agencies to amplify the fear of adverse SEO, because it creates demand for monitoring services and disavow campaigns. Be appropriately sceptical when someone tells you that you are under attack. Ask for the evidence.

How to Detect an Adverse SEO Attack

Detection comes down to monitoring. If you are not watching your backlink profile regularly, you will not catch an attack until the damage is done. These are the signals worth tracking.

Sudden spikes in referring domains. A legitimate link building programme generates referring domains gradually. If your link count jumps by hundreds or thousands in a short window, that is a signal worth investigating. Not all of it will be malicious, but the timing and source quality matter.

Anchor text profile changes. Pull your anchor text distribution in Ahrefs or SEMrush. If you suddenly have a high concentration of exact-match commercial anchors, or anchors that are explicitly spammy or unrelated to your business, something has changed. A healthy link profile has a natural spread of branded, navigational, and descriptive anchors.

Links from known spam networks. Some link networks are so well-documented that their appearance in your profile is a clear signal. Tools like Ahrefs flag these with toxicity scores, though those scores are a starting point for investigation, not a verdict. I have seen perfectly legitimate links flagged as toxic and genuinely harmful links sail through clean. Use the scores as a filter, not a conclusion.

Ranking drops that correlate with link spikes. If your rankings drop in the same period that your referring domain count spikes, that correlation is worth investigating. Correlation is not causation, and I have judged enough Effie entries to know how often marketers confuse the two, but in this context it is a reasonable starting hypothesis.

Google Search Console manual actions. If Google has issued a manual penalty related to unnatural links, you will see it in Search Console under Security and Manual Actions. This is a definitive signal. Algorithmic devaluation is harder to confirm, but a manual action removes all ambiguity.

What to Do When You Suspect an Attack

The worst response is panic. I have watched clients disavow hundreds of legitimate links because they ran a toxicity report and treated the output as gospel. That kind of reactive disavow campaign can do more damage than the original attack. Slow down, be methodical, and work through the evidence before you take action.

Step one: audit the links. Export your full backlink profile from at least two tools, because no single tool has complete coverage. Ahrefs and Google Search Console together give you a reasonable picture. Go through the new links manually. Look at the linking domains. Are they real sites with real content, or are they obviously fabricated? What is the anchor text? Does the link make any contextual sense?

Step two: separate the noise from the threat. Most spam links are ignored by Google. The ones that carry risk are those that come from explicitly penalised domains, those that appear in large coordinated volumes with matching anchor text, and those from link networks that have been the subject of Google manual actions. Focus your attention on those categories.

Step three: document everything. If you are going to submit a disavow file or a reconsideration request, you need a clear record of what you found, when you found it, and what you did about it. Google’s guidance on reconsideration requests is explicit: you need to demonstrate that you have identified the problem and taken steps to address it. Sloppy documentation weakens your case.

Step four: use the disavow tool with precision. The disavow tool tells Google to ignore specific links when assessing your site. It is not a panic button. Disavow at the domain level only when you are confident that an entire domain is problematic, not just a single page. For isolated bad links, disavow at the URL level. And do not disavow links you are not sure about. When in doubt, leave it out of the disavow file.

Step five: strengthen your legitimate link profile. This is the response that actually moves the needle. A strong, diverse link profile from authoritative sources makes toxic links proportionally less significant. If your good links vastly outnumber the bad ones, the bad ones have less leverage. The best long-term defence against adverse SEO is the same as the best long-term SEO strategy: earn links that are genuinely hard to replicate. Moz’s current thinking on SEO fundamentals reinforces this point, and it is consistent with what I have seen work over two decades of managing link building at scale.

The Disavow Tool: What It Does and Does Not Do

Google introduced the disavow tool in 2012, partly in response to the Penguin update and partly because there were genuine cases where sites had been harmed by links they did not create. It allows you to submit a file of domains or URLs and tell Google to discount those links when evaluating your site.

What it does not do is immediately reverse a ranking drop. If you submit a disavow file today, you will not see results tomorrow. Google processes disavow files when it recrawls the relevant pages, which can take weeks or months. It also does not undo a manual penalty automatically. If you have a manual action, you need to submit a reconsideration request separately after cleaning up your link profile.

There is also a broader question about whether the disavow tool is as necessary as it once was. Google has repeatedly stated that its algorithms are now better at identifying and ignoring low-quality links without needing a disavow file. For sites that have never done aggressive link building, Google’s advice has shifted toward not needing to disavow unless you have a specific reason to believe links are causing harm. That is a meaningful shift from the post-Penguin era, when disavow campaigns were almost reflexive.

My position, after managing link profiles across hundreds of client accounts, is that the disavow tool is useful in specific circumstances: active attacks with clear evidence, inherited link profiles from previous agencies that engaged in manipulative tactics, and sites with confirmed manual actions. Outside those scenarios, I would rather invest the time in building good links than in cataloguing bad ones.

Content Scraping: The Underrated Attack Vector

Toxic links get most of the attention in adverse SEO discussions, but content scraping deserves more consideration, particularly for publishers and content-heavy sites. The mechanics are straightforward: automated tools copy your content and republish it across networks of low-quality sites. If those scraped versions get indexed before your original, or if they accumulate more links, Google may struggle to identify which version is canonical.

The defence here is partly technical and partly about publishing hygiene. Make sure your canonical tags are correctly implemented. Submit new content to Google Search Console immediately after publishing, using the URL Inspection tool to request indexing. Build internal links to new content quickly, so Googlebot finds it through your own site structure rather than waiting for an external crawl.

If you find scraped versions of your content ranking above your originals, the first step is to use the canonical tag on your original pages and ensure they are properly indexed. If the problem persists and the scraping is clearly deliberate, you have grounds for a DMCA takedown request. Google has a straightforward process for this, and it is more effective than most people expect when the evidence of copying is clear.

One thing worth noting: most content scraping is opportunistic rather than targeted. Bots scrape content indiscriminately because it is cheap to do so. Targeted scraping as an adverse SEO tactic requires more deliberate effort. If you are seeing scraping, it is worth establishing whether it is a broad, automated issue or something more focused before deciding how much energy to spend on it.

Protecting Yourself Before an Attack Happens

The most effective adverse SEO strategy is a defensive one, and most of it overlaps with good SEO practice anyway. There is no special programme to implement. It is the same work, done consistently.

Build a strong, diverse link profile. This is the single biggest protective factor. If you have thousands of high-quality links from authoritative, relevant sources, a few hundred spam links represent a rounding error. The ratio matters. Sites with thin link profiles are far more vulnerable to toxic link attacks than sites with established authority. Building a resilient SEO strategy means treating link acquisition as an ongoing programme, not a one-time campaign.

Monitor your backlink profile monthly. You do not need to check daily, but monthly reviews catch problems early enough to respond before they escalate. Set up alerts in Ahrefs or your preferred tool for significant changes in referring domain count. A spike of 50 new domains in a week is worth a look. A spike of 500 is urgent.

Keep a clean technical foundation. Sites with fast load times, clean crawl structures, and no existing technical issues are harder to damage. Adverse SEO often exploits existing weaknesses. A site that already has crawl budget problems, duplicate content issues, or slow server response times is more vulnerable to attacks that target those vectors.

Use Google Search Console consistently. It is free, it is authoritative, and it tells you things no third-party tool can. Check it for manual actions, crawl errors, and indexing issues on a regular basis. If something has gone wrong, Search Console will usually show you the first signal.

Document your legitimate link building activity. If you are running an outreach programme, keep records. If you ever need to submit a reconsideration request or explain your link profile to Google, being able to demonstrate that your links were earned through legitimate activity is enormously valuable. I have seen clients spend weeks trying to reconstruct link building history that should have been documented from the start.

Adverse SEO is one part of a much larger picture. If you want to understand how link building, technical SEO, and competitive positioning fit together into a coherent strategy, the Complete SEO Strategy hub covers each of these areas in depth.

A Note on Proportionality

One of the things I have noticed over the years is that adverse SEO tends to generate a response that is disproportionate to the actual threat. Part of that is the emotional charge of believing someone is actively trying to harm your business. Part of it is the opacity of search algorithms, which makes it hard to distinguish an attack from an algorithmic update from a natural ranking fluctuation.

When I was running an agency and managing large search budgets across multiple clients, we had a rule: before attributing a ranking drop to adverse SEO, rule out everything else first. Algorithm updates, technical regressions, competitor improvements, seasonal patterns, and changes to your own content are all more common causes of ranking drops than deliberate attacks. Adverse SEO is the last explanation you should reach for, not the first.

That discipline matters because the wrong diagnosis leads to the wrong treatment. If you spend three weeks auditing and disavowing links when your ranking drop was actually caused by a technical issue introduced in a site migration, you have wasted three weeks and potentially done additional damage with an overzealous disavow file. Be systematic. Be sceptical. Let the evidence lead.

The same critical thinking that I saw rewarded in the best Effie entries applies here. The marketers who impressed me most as a judge were the ones who were honest about what they knew versus what they inferred, and who were rigorous about alternative explanations for the results they were claiming. That same rigour belongs in your SEO diagnosis process. Do not claim causation when you have correlation. Do not assume malice when incompetence or algorithm changes are more likely explanations. And do not let the anxiety of a ranking drop push you into actions you cannot reverse.

Search Engine Land has covered the competitive dynamics of search for years, and their early analysis of competitive search behaviour reflects how long these dynamics have been in play. The tactics change, but the underlying incentives in competitive search have been consistent for a long time.

About the Author

Keith Lacy is a marketing strategist and former agency CEO with 20+ years of experience across agency leadership, performance marketing, and commercial strategy. He writes The Marketing Juice to cut through the noise and share what works.

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