Link building is the process of earning links from other websites pointing to yours. In SEO, these links (called backlinks) work as "votes of confidence". The more relevant, trustworthy sites link to you, the higher your domain's authority in Google's eyes.
The importance of link building goes beyond SEO. For GEO, backlinks from trusted sources are one of the factors AIs use to decide which brands to cite. If your site is referenced by news portals, industry magazines and authoritative blogs, AIs interpret that as a signal of credibility.
Quality link building is not buying links or trading links in bulk. It is building editorial relationships with relevant publications, producing reference-worthy content and creating linkable assets (research, free tools, definitive guides) that other sites want to cite naturally. At Netlinks, link building is the "L" pillar of the method, with a dedicated team for prospecting and editorial outreach.