PBN, or Private Blog Network, is a strategy used in search engine optimization (SEO) to improve a website’s ranking on search engine results pages (SERPs). It involves creating a network of high-quality, authoritative websites that link back to a target website, thereby increasing its credibility and visibility to search engines. PBNs are typically built by purchasing expired or unused domains with existing backlinks and using them to create new content and link to the target website. While PBNs can be effective in boosting a website’s SEO, they are also considered a controversial tactic and can result in penalties from search engines if not executed properly.