We take on a lot of clients who've been burned by a previous SEO agency. The conversation usually starts the same way: "We were told everything was going great, then our traffic fell off a cliff." When we dig into what the old agency was actually doing, we almost always find at least one of the techniques on this list.
Some of them are obvious — the kind of thing that screams spam from a mile away. Others are subtler. They look like legitimate strategies on the surface, and a less experienced agency might even defend them as "standard practice." But Google's algorithms have gotten remarkably good at detecting manipulation, and the penalties — both algorithmic and manual — can set a business back months or even years.
Here are the twelve techniques we tell every client to avoid, along with what to do instead.
This one's been dead for over a decade, and yet we still see it. Keyword stuffing is cramming your target keyword into a page as many times as possible, usually in ways that read like a robot wrote it.
Nobody talks like that. Google knows nobody talks like that. This approach tanked rankings back when Panda launched in 2011, and it's only gotten worse since. Modern algorithms measure keyword density, reading quality, and natural language patterns. The page above would be flagged almost instantly.
This is the one that burns people the worst. An agency offers to "build 500 backlinks" for $200 a month, and it sounds like a steal. The links come from sites that exist solely to sell links — PBNs (private blog networks), directory farms, foreign blog comment networks, and article spinners.
Google's Penguin algorithm was built specifically to detect and penalize unnatural link patterns. And they've gotten shockingly good at it. We've inherited clients who lost 60–80% of their organic traffic overnight because their previous agency was buying cheap links by the hundreds.
The recovery process? Manually identifying every toxic link. Submitting a disavow file to Google. Waiting months for the penalty to lift. Sometimes starting over entirely with a new domain. It's brutal, and it's completely avoidable.
Copying content from other websites and pasting it onto yours. Or hiring a content mill that produces "articles" by lightly rewriting existing pages from competitors. We've even seen agencies copy content from their other clients' sites and swap out the business name. It's lazy, it's detectable, and it doesn't work.
Google's algorithms compare content across the entire web. If your page is substantially similar to content that already exists elsewhere, it either won't rank at all or it'll be filtered out in favor of the original source.
Cloaking means showing different content to Google's crawler than what actual visitors see. The idea is to feed Google keyword-optimized content while showing visitors a completely different page. It's been a direct violation of Google's guidelines since the beginning, and it triggers manual penalties when detected.
It sounds obscure, but we've seen it in the wild more than you'd expect — particularly with agencies that use doorway pages or redirect schemes. If a page shows one thing when you visit it in a browser and something different in Google's cache, that's cloaking.
White text on a white background. Font size set to zero. Keywords crammed behind images or pushed off-screen with CSS. These tricks are as old as SEO itself, and Google has been catching them since 2003.
The logic was simple: stuff a page with keywords that visitors can't see but crawlers can read. The problem is Google specifically looks for this pattern now. CSS properties like display:none, font-size:0, color:transparent, and off-screen positioning on keyword-heavy text are all detectable signals.
Doorway pages are low-quality pages created solely to rank for specific keyword variations, then redirect visitors to a different page. The classic example: creating 50 pages for "personal injury lawyer [city name]" that are all basically identical except for the city name, and they all funnel visitors to the same contact form.
Google explicitly targets this in their spam policies. We see it most often with multi-location businesses that create thin location pages with no real local content — just template text with the city name swapped out.
Anchor text is the clickable text in a hyperlink. When 90% of your backlinks use the exact same anchor text — like "best personal injury lawyer Austin TX" — it looks unnatural because it is unnatural. Real people linking to your site use your business name, "click here," the URL itself, or a natural phrase. They don't all use your target keyword verbatim.
Over-optimized anchor text was one of the primary signals Penguin was designed to catch. A natural backlink profile has a diverse mix of branded anchors, naked URLs, generic phrases, and the occasional keyword-rich anchor. An unnatural one is obvious to both algorithms and manual reviewers.
Let's be clear about this one. The issue isn't that content was produced with the help of AI — it's that the content is low-quality, generic, and adds nothing new. Publishing 200 blog posts a month that all sound the same, contain no original insight, and exist solely to target keywords is the modern version of article spinning. The technology changed. The intent didn't.
Google's Helpful Content system specifically targets content that exists primarily to manipulate search rankings rather than to serve users. If a page reads like it was mass-produced with zero human expertise, editorial judgment, or original perspective, it's vulnerable — regardless of whether a human or machine typed the words.
Fake reviews. Incentivized reviews. Paying for positive reviews. Having employees write reviews. Offering discounts in exchange for 5-star ratings. All of it violates Google's policies, and all of it is detectable.
Google's review fraud detection has gotten significantly more sophisticated. Unusual patterns — a burst of 5-star reviews from accounts with no other review history, reviews that all use similar language, reviews submitted from the same IP range — all raise flags. When Google catches it, they remove the reviews and can suspend your Google Business Profile entirely.
For regulated industries, this is especially dangerous. A law firm caught buying reviews faces both a Google suspension and potential state bar discipline. A healthcare provider doing it risks both Google penalties and HIPAA scrutiny if the review process reveals patient relationships.
"You link to me, I'll link to you" sounds harmless. And a few natural reciprocal links between related businesses are fine. But organized link exchange networks — where dozens or hundreds of sites all link to each other specifically to inflate link metrics — are a well-documented violation of Google's guidelines.
The same goes for "link wheels," "link pyramids," and any scheme where the primary purpose of the links is to manipulate PageRank. Google's algorithms trace link patterns across networks, and unnatural clustering is one of the easier patterns to detect.
Creating hundreds of pages with minimal content — 100-word service descriptions, auto-generated location pages, boilerplate FAQ pages — in the hope that sheer volume will capture more keywords. This approach worked briefly around 2010. Google's Panda update made it obsolete.
Thin content doesn't just fail to rank — it can drag down your entire site. Google evaluates site-wide quality signals. If half your pages are thin, the quality assessment of your strong pages suffers too. We've helped clients improve their overall rankings by deleting low-quality pages, which sounds counterintuitive until you understand how site quality scoring works.
Redirecting a high-authority URL to a completely unrelated page to transfer its link equity. Or using JavaScript redirects to send mobile users to different pages than desktop users. Or acquiring expired domains with existing authority and redirecting them to your site to inflate your link profile.
These all fall under Google's spam policies. The redirects are detectable, the intent is obvious, and the penalties are severe — typically a manual action that requires a reconsideration request and months of remediation.
Whenever we evaluate an SEO tactic — whether it's something we're considering for a client or something a previous agency was doing — we apply a straightforward test:
Would we be comfortable explaining this technique to a Google engineer? If the answer is "we'd rather they didn't know about it," it's a technique that should be avoided. Sustainable SEO doesn't require hiding anything. It requires doing the work — building genuinely useful content, earning legitimate links, and creating a website that serves the people visiting it.
The businesses that win at SEO long-term are the ones that never have to worry about the next algorithm update because they weren't gaming the system in the first place. They invested in content quality, earned their authority honestly, and built websites that serve their clients — not Google's crawler.
If you're worried that a current or previous agency may have used techniques on this list, our free SEO audit includes a backlink toxicity analysis and technical review that identifies potential problems before they become penalties.
Our free audit includes a backlink toxicity analysis, content quality review, and technical scan that identifies risky techniques before they trigger penalties.