PBNs apply when you need to control your backlink profile directly instead of relying on outreach, guest posts, or earning links naturally. The typical use cases are competitive commercial niches where every competitor is buying links anyway, new sites that need initial authority to rank at all, and local businesses in markets where legitimate local citations and editorial links are nearly impossible to get without spending thousands on PR. In practice, PBNs get used most heavily in finance (loans, credit cards), legal (personal injury, criminal defense), iGaming and affiliate sites, and sometimes local home services where the business can't produce linkable content. They also show up in e-commerce when a brand needs to rank product pages fast and doesn't have time to build content marketing momentum. The core trade-off is speed and control versus risk. A PBN gives you links on your timeline with anchor text you choose, but Google explicitly prohibits them and will deindex both the PBN domains and your money site if the footprint is obvious. Common footprints include shared hosting IPs, identical site templates, same registrant info, interlinking between PBN domains, and thin content that exists only to pass PageRank. At Ottawa SEO, we don't run PBNs for clients because the risk-reward doesn't make sense in 2025. Google's detection has improved, penalties are manual and hard to recover from, and the upfront cost of buying expired domains, hosting them separately, and creating unique content for each site often exceeds what you'd spend on legitimate digital PR or niche edits from real sites. If a client insists on fast links, we point them toward aged niche edits on topically relevant sites with real traffic, which carry lower footprint risk. PBNs still exist and still work in the short term for people who know how to mask footprints and accept the penalty risk. But they apply best when you're in a gray-hat niche where traditional link building won't work anyway, or when you're testing a site you're willing to burn.