Define the network question

A private blog network, or PBN, commonly means a set of controlled sites used to create links intended to influence search rankings. The important questions concern control and purpose, not simply whether several websites are related. A publisher can legitimately operate multiple publications for real audiences. This guide evaluates the evidence behind a PBN label; it does not provide a list of sites to buy from or instructions for building a concealed network.

Separate infrastructure from editorial control

A shared IP address, CDN, theme or analytics pattern can suggest where to investigate, but none alone proves common ownership or manipulative intent. Shared services can connect unrelated websites. Look for stronger, attributable evidence such as disclosed publisher identities, editorial policies and documented placement terms. Keep an observed technical similarity separate from the conclusion you are considering. If ownership cannot be established, record it as unknown instead of turning a resemblance into a definitive accusation.

Compare three publishing contexts

Our fictional comparison has three cases. First, journal.example and notes.example share infrastructure, while their ownership is unknown. Second, a disclosed publisher operates two genuine publications that occasionally reference relevant resources. Third, a supplier’s written offer promises control of both source pages, specified commercial anchors and ranking-credit links to target.example in exchange for payment. The third case provides different evidence from the first two. These domains and terms are invented; the matrix is a reasoning exercise, not a report on actual businesses.

  • Shared infrastructure: Example observation: Two fictional sites use the same delivery service; Evidence to record: Technical observation and its date; Action if it differs: Treat as a clue; ownership and intent remain unknown
  • Disclosed ownership: Example observation: A publisher openly operates two publications; Evidence to record: Publisher identity, editorial policies and audience purpose; Action if it differs: Evaluate the actual relationship; common ownership alone is not a verdict
  • Linking purpose: Example observation: Relevant references differ from guaranteed ranking-credit offers; Evidence to record: Page context and documented placement terms; Action if it differs: Assess purpose and Google’s link-spam guidance
  • Commercial terms: Example observation: A fictional supplier promises exact anchors and source-page control; Evidence to record: Written offer, compensation and actual link attributes; Action if it differs: Do not buy a ranking guarantee; qualify advertising links appropriately
  • Published-page evidence: Example observation: The final link may differ from the seller’s description; Evidence to record: Source URL, target, anchor, rel, review date and verified owner; Action if it differs: Record confirmed differences and unknowns before deciding

Evaluate purpose and commercial terms

Google’s link-spam guidance focuses on links created primarily to manipulate ranking, including buying or selling links for that purpose. Evaluate the actual offer and published context rather than accepting claims of safety from a network label. Advertising links should be appropriately qualified; Google prefers rel=sponsored for paid placements and also accepts nofollow. An attribute does not by itself establish content quality, honest ownership or a genuine audience. Do not confuse ordinary commercial disclosure with a guarantee of search benefit.

Document the actual page and relationship

For each candidate, record the source page, target, anchor, visible context, actual rel attributes, disclosed owner and the document supporting any control claim. Note the date and whether the evidence comes from a public page or an unverified seller statement. Keep invoices and personal information private. If the final page differs from an agreed placement, document the difference and pursue the appropriate correction with the responsible party. No single domain metric or network diagram replaces this page-level review.

  • Separate observed similarity from inferred ownership.
  • Ask what audience and editorial purpose each publication serves.
  • Read actual commercial terms instead of relying on a network label.
  • Inspect the published page and keep sensitive contracts private.
  • Record uncertainty; neither a score nor an absent signal certifies safety.

Understand the limits of detection

The linked 2019 PBN study is historical research, not a current inventory, detection guarantee or estimate of today’s prevalence. Similarities can create false positives, while missing similarities cannot certify that a site is independent. Search Console reports and manual-action information have their own scopes; neither gives this worksheet an automated verdict. No real publisher has been evaluated here. The result is a documented decision with explicit unknowns, not a promise that a link is safe, permanent or effective for rankings.

Fictional comparison, not a classification of real publishers. No network is scanned, no PBN inventory is offered and no link or ranking outcome is verified.