The names come from old Western films, where villains wore black hats and heroes wore white. In SEO, black hat describes tactics designed to manipulate rankings in ways that break search engines’ rules. White hat describes improving a site for the people who use it, within the guidelines. “Gray hat” is sometimes used for tactics in between, though in practice most gray hat tactics carry the same risks as black hat ones.
Google’s rules are published as its spam policies, part of Google Search Essentials.
Common black hat tactics
- Buying or selling links that pass ranking value, private blog networks (PBNs) and large-scale link exchanges
- Keyword stuffing: cramming keywords into text, alt attributes or hidden areas
- Cloaking: showing search engines different content from what visitors see
- Hidden text and links, such as white text on a white background
- Doorway pages: many near-identical pages built to rank for variations of a search
- Scaled content abuse: mass-producing pages, by any method including AI, mainly to rank (added to the spam policies in March 2024)
- Site reputation abuse: hosting third-party content on a trusted site to borrow its rankings
- Expired domain abuse: buying old domains to host unrelated, low-value content
- Fake reviews and misleading structured data
- Negative SEO: trying to harm competitors, for example with spam links
The risks
Google handles these in two ways. Algorithmic: its systems (including SpamBrain) detect spam and ignore or demote it, often during spam updates. Manual actions: a Google reviewer applies a penalty, shown in Search Console, which can remove pages or the whole site from results until fixed.
For a real business, the cost goes beyond rankings. Coastline Plumbing once paid for a “first page guaranteed” package. Traffic rose for four months, then collapsed after a spam update. The links were bought from a network Google had identified. Cleanup took most of a year: identifying links, requesting removals, using the disavow tool and filing a reconsideration request after a manual action. Meanwhile, the competitors who’d spent the same money on reviews, local links and better pages kept their rankings.
White hat alternatives
| Instead of | Do this |
|---|---|
| Buying links | Earn them with useful content, local partnerships and PR |
| Doorway pages | Fewer, genuinely useful location or service pages |
| Keyword stuffing | Answer the question clearly in natural language |
| Fake reviews | Ask every real customer for a review |
| Mass AI content | Expert-reviewed content with first-hand detail |
How to spot a black hat provider
Guarantees of specific rankings, “dofollow links from high-DA sites” for a fixed price, secret methods, and reluctance to say what work was done are all warning signs. So are huge numbers of pages generated overnight, which is where programmatic SEO can cross the line.
If you inherit a site with a history of black hat work, review its backlinks for patterns like those described under toxic backlinks, and watch closely during each spam algorithm update.