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Link building rests on Google's founding logic: an inbound link is a vote of confidence. The more links a site receives from recognized, topically relevant sources, the more authority Google attributes to it within its domain. This logic, almost 30 years old, remains one of the most stable ranking signals — even though its implementation has evolved deeply.
Quality vs. quantity: the fundamental pivot
The era of mass link building is over. Google has deployed sophisticated algorithms to detect artificial link profiles, and its teams apply manual penalties on sites that abuse link purchasing. A single backlink from a national media outlet or recognized industry publication is worth more than hundreds of links from generic directories. The determining criteria are: the source site's authority, topical relevance, the editorial context of the link, and the anchor text used.
Legitimate link building methods
The most effective and durable approaches are: digital PR (earning mentions and links in the press through studies, expert opinion pieces, original data), editorial guest posting (publishing value-add articles on partner sites), creation of linkable assets (tools, industry studies, reference guides that generate natural links), and editorial partnerships with complementary actors.
Link building and GEO: a direct connection
Authority built through link building is a signal that LLMs take into account indirectly. Sources frequently cited by other authoritative sources — precisely what PageRank measures — are also those LLMs consider more reliable. A strong link profile and high LLM presence share the same root causes: credibility and authority in a domain.
