6 Black Hat SEO Techniques to Avoid in Your Website

Last updated: September 2026

Black Hat SEO Techniques are the tactics that break Google’s spam policies to win rankings, such as keyword stuffing, cloaking, buying links, private blog networks and spam blog comments. The trade is short-term movement for a real risk of demotion or removal from Google Search results. DigiFix works with Melbourne businesses on white hat SEO, and this guide covers the six techniques that do the most damage.

• Google’s Search spam policies page, last updated 28 August 2026, names more than fifteen banned practices, including cloaking, keyword stuffing, link spam and scaled content abuse.
• Google documents practices that can lead to demotion or removal from search results, so a black hat campaign can cost you the traffic a legitimate campaign would have earned.
• Keyword stuffing, cloaking, article spinning, private blog networks, spam blog comments and buying links are the six oldest black hat techniques still in use today.
• Most black hat tactics leave a footprint that is easy for a reviewer to see, and cleaning it up takes longer than building it did.
• White hat SEO produces slower movement in the first 90 days and far more durable rankings after that.
• Google Search Console is the fastest way to check whether a manual action has been applied to your site.

What is black hat SEO?

Black hat SEO is the practice of ranking a website by violating search engine guidelines rather than earning the position. It works by exploiting how a search engine can be fooled, which is why it tends to produce sudden gains followed by sudden losses.

Google’s Search Central documentation sets out the rules a site has to follow to stay eligible for search results. Google does not treat these as suggestions. Its spam policies page, last updated 28 August 2026, lists the banned practices by name and explains how each one is detected.

The reason black hat SEO keeps coming back is that it looks like a shortcut. The reason it fails is that the technique and the outcome are unrelated. A page that ranks through a purchased link has not become more useful to anybody, so nothing holds the position up once that link stops counting.

What does Google actually ban?

Old industry jargon and Google’s current policy names do not line up, which is how businesses get caught out. A tactic sold as an “outreach campaign” may sit under link spam. A tactic sold as “content refresh” may sit under scaled content abuse.

This table pairs the six techniques in this post with the policy Google applies to them.

In text form, the same four stages read as follows. A black hat tactic is applied. Google either detects it through automated spam systems or a reviewer finds it. The site is demoted or removed from results. Recovery work then begins, and it always takes longer than building the tactic did.

Why should you avoid black hat SEO?

Google states that violating its spam policies can lead to demotion or removal from search results. That is the formal consequence, and it is the smallest part of the damage.

The commercial damage is bigger. Organic traffic is the cheapest pipeline most Melbourne businesses have, and it compounds. A site that loses it does not just lose the sessions, it loses every enquiry those sessions would have produced for the following year.

There is also a cleanup cost. Removing a network of purchased links, rewriting spun pages and disavowing a link profile is slow, unpaid work that produces no ranking gain. You are paying to get back to where you started.

Which black hat SEO techniques should you never use?

These six techniques account for most of the black hat work still sold to small businesses in Australia. Each one has a legitimate alternative that takes longer and holds up better.

1. Keyword stuffing

Keyword stuffing is the practice of repeating a search phrase in a page more often than a reader would ever need it. Google names it directly in its spam policies and treats it as a signal that the page was written for a crawler rather than a customer.

The damage is not just a ranking risk. A stuffed page reads badly, so it converts badly, and the traffic that does arrive leaves.

The alternative is to write the page for the person searching, use the keyword where it naturally belongs, and cover the related questions instead of repeating one phrase. Google’s own guidance is that content should be written for people first.

2. Cloaking

Cloaking is showing one version of a page to Google and a different version to visitors. It is usually done to rank for a term the actual page does not deserve.

Cloaking sits next to sneakier versions of the same trick, such as showing a crawler a page of text and a visitor a redirect. Google covers both under cloaking and sneaky redirects.

There is no legitimate alternative because there is no legitimate use. If the page you show Google is not the page your customer sees, the page should not exist.

3. Article spinning

Article spinning is copying someone else’s content and rewriting it just enough to look different. Google’s current policy name for the industrial version of this is scaled content abuse, and it covers text, images and video produced at volume without adding value.

Two risks sit here. The first is search related, because the copied pages are discounted. The second is legal, because republishing another publisher’s work can breach copyright.

The alternative is to publish what only your business can write: your own client results, your own process, your own photographs. DigiFix takes the same position on every content project we run for a client.

4. Private blog networks

A private blog network is a group of websites built by one owner purely to link to each other. The purpose is to manufacture the appearance of authority.

Google covers this under link spam, and expired domain abuse covers the variant where an old domain is bought for its existing link history.

The failure mode is the whole network, not one site. When Google identifies the pattern, every link in it stops counting at once, and the sites that depended on it fall together.

The alternative is fewer links from businesses a real audience recognises. Ten genuine mentions from Australian industry sites will outperform a hundred network links once the network is found.

5. Spam blog comments

Comment spam is the practice of posting a comment carrying your link on any blog that will accept it. The intent is a free backlink, and blog owners see the pattern immediately.

Google treats this as link spam and user-generated spam. Most comments of this kind are either removed, marked as spam, or published with the link stripped of its value.

The alternative is participation. Answer a question properly, link only when the link answers something, and you earn the click rather than the crawl.

6. Buying links

Buying links is paying a website or a marketplace to place a link purely to move rankings. Google’s link spam policy covers bought links, exchanged links and any link intended to manipulate ranking rather than to help a reader.

The tell is that the position collapses the moment the links stop counting. A bought link does not make your page more useful, so nothing holds the ranking up.

The alternative is to earn links with something worth linking to. Original data, a clear explainer, a free tool. DigiFix publishes its own client results for exactly this reason.

What is the difference between black hat and white hat SEO?

The difference is not the tactic, it is who the work is for. White hat SEO improves the page for the person searching and lets the ranking follow. Black hat SEO changes the signals Google reads without changing anything for a real visitor.

How long does it take to recover from a Google penalty?

There is no fixed number, and any agency quoting one is guessing. Recovery depends on what was done, how much of the site it touched and whether a human reviewer looks at the site again.

What can be said honestly is the shape of it. A manual action needs the offending work removed, a documented record of what was removed, and a reconsideration request that explains it. Algorithmic demotions do not have a request process at all, so they recover when the site is strong enough to re-earn the position.

The practical point is that prevention is cheaper than repair. Cleaning a link profile costs more than never buying the links, and it produces no new rankings while you do it.

What does black hat SEO risk look like for a Melbourne business?

Consider a Clayton cafe or trades business that hired a cheap agency two years ago. The agency built forty directory links, spun three service pages and packed the home page with suburb names. The phone still rings, and the owner has no idea whether any of it is a problem.

What DigiFix would actually do, in order. First, pull the Search Console manual actions report to establish whether Google has already flagged the site. Second, export the backlink profile and separate links that carry real traffic from links that only carry value. Third, rewrite the spun pages as genuine service pages and remove the suburb repetition from the home page. Fourth, either remove the low value links where we control them, or disavow them where we do not. Fifth, resume normal publishing so the site has something positive to rank.

That is roughly a month of work before anything improves, and the client sees no ranking gain during it. If nothing is done, the site keeps the risk and keeps none of the defence, and the next spam update decides the outcome.

How can you check if your website is already affected?

You can check the largest risks yourself in about twenty minutes, without any paid tool. Login to Google Search Console and open the manual actions report first, because that is the only place a manual penalty is disclosed.

Then work through four checks. Search your main keyword and see whether your page appears at all. Look at the Pages report for pages that dropped out of the index without you changing them. Export your backlinks and sort by domain, looking for clusters of sites that link to each other. Read your own top pages out loud and count how often the keyword repeats.

Across the SEO audits DigiFix runs for Melbourne businesses, the pattern is consistent. Owners who check these four things find the problem before Google does, and fixing it early is far cheaper than fixing it after a demotion.

Where can you learn more about doing SEO properly?

If you want to understand the rules properly rather than avoid them, the DigiFix blog is written for business owners rather than specialists. Start with the SEO glossary with 80 essential SEO terms if the jargon is getting in the way.

Two further reads are worth your time. The August 2026 Google spam update explained covers what changed most recently, and the technical SEO fixes DigiFix applies first covers the groundwork that makes any ranking strategy hold.

For the wider context on how search now pulls answers from pages rather than only links, read the ultimate guide to generative engine optimisation. If your content has already drifted into repetition, the guide to optimising website content walks through the rewrite.

Frequently asked questions about black hat SEO

Does black hat SEO still work in 2026?
It can produce a short-term lift, and that is the whole offer. Google’s spam systems are automated and its policy list is published and updated, so any technique on that list is a countdown rather than a strategy. The businesses that keep rankings are the ones that never bought the shortcut.

What is the difference between black hat and grey hat SEO?
Grey hat SEO sits between the two. It usually involves a tactic Google has not explicitly banned but that does not help a reader either, such as paying for a link in a way that is not disclosed. Grey hat carries the same underlying problem as black hat, which is that the ranking is not backed by anything the visitor values.

Will Google penalise my whole website for one black hat technique?
It can. Google states that violations of its spam policies can lead to demotion or removal from search results, and that action is not always limited to the page involved. Link spam in particular is assessed at the site level, so one purchased link network can affect every page on the domain.

How do I know if my website has a manual action?
A manual action is only disclosed in one place, which is the manual actions report inside Google Search Console. If that report is empty, any ranking movement you are seeing is algorithmic rather than a penalty. Ranking drops with no manual action are common and are usually caused by competitors improving rather than by a penalty.

Can a black hat agency hurt a website I already own?
Yes, and this is the most common way Melbourne businesses end up with a problem they did not create. A cheap SEO contract that promises rankings in a month is usually fulfilled with purchased links or spun content. If you have had that contract, checking the backlink profile now is worth the time.

What should I look for when hiring an SEO agency?
Ask what they will build and who it is for. A legitimate agency can explain each action in terms of the visitor it helps. Ask to see the link sources before they are placed, and ask who owns the content and the accounts. If the answer is that the work cannot be described without jargon, the work is probably not defensible.

Conclusion

Black hat SEO is a trade of long term visibility for short-term movement, and Google’s published spam policies make the trade easy to see before you take it. Keyword stuffing, cloaking, article spinning, private blog networks, spam blog comments and buying links all appear on that list by name.

The six techniques in this guide are avoidable at no cost. Write for the person searching, show Google the same page your customer sees, publish work only your business could publish, build links by being worth mentioning, and take part in your industry rather than littering it.

If you would rather have the risk assessed properly, DigiFix works with Melbourne businesses on SEO that survives updates. You can see the work on the DigiFix portfolio, read more about the team on the about DigiFix page, or browse the DigiFix blog for more guides like this one.