Link Building

What is link building?

Link building is the process of acquiring links from other websites (backlinks) pointing to your site. It is one of the most important elements of off-page SEO, because Google treats links as "votes of confidence" — the more high-quality sites link to you, the higher your domain authority.

Link building is one of the most challenging yet most effective elements of an SEO strategy. It requires a combination of creating valuable content, building relationships, and systematic effort. Proven link building strategies help build a link profile in a way that complies with Google's guidelines.

Why are links important?

Google's algorithm has relied on link analysis (PageRank) from the very beginning, and despite algorithm evolution, links remain one of the three most important ranking factors. However, quality matters, not quantity — a single link from an authoritative industry site is worth more than hundreds of links from low-quality directories. Learn more about the role of links in the context of an overall strategy in our SEO fundamentals guide.

Benefits of a strong link profile:

• Higher SERP positions — pages with a better link profile rank higher
• Higher Domain Rating — the domain authority metric grows with the number of quality links
• Faster indexing — Google discovers pages with links faster
• Referral traffic — links from popular sites generate direct traffic
• AI visibility — language models (GEO) more frequently cite pages with a strong link profile

How does Google evaluate links?

Not all links have the same value. Google evaluates links based on:

• Authority of the linking site — a link from a DR 70+ site is exponentially more valuable
• Topical relevance — a link from an industry site carries more weight than one from an unrelated topic
• Position on the page — a link in article content (editorial) > sidebar link > footer link
• Anchor text — the clickable text signals to Google the topic of the target page
• Rel attribute — dofollow vs nofollow / sponsored / ugc
• Naturalness — organically acquired links carry more weight than schematic ones

Popular link building strategies

Content-based strategies

• Creating linkable assets — research, reports, calculators, infographics — content that others naturally want to link to
• Content marketing — valuable expert articles that attract links
• Data-driven content — original data, surveys, market research — the most frequently cited type of content
• Guides and tutorials — comprehensive topic coverage (pillar pages) that become reference points in the industry

Relationship-based strategies

• Guest posting — publishing expert articles on external portals with a backlink
• Digital PR — building relationships with media, journalists, and industry bloggers
• Expert commentary (HARO/Qwoted) — providing quotes for press articles
• Industry partnerships — joint projects, webinars, reports with partners

Technical strategies

• Broken link building — finding broken links on other sites and proposing your content as a replacement
• Unlinked brand mentions — finding mentions of your brand without a link and requesting one
• Reclaim lost links — recovering links lost after a redesign or migration of the linking site
• Skyscraper technique — creating a better version of existing popular content and contacting authors who link to the original

Internal link building

Internal linking — while technically not "link building" in the traditional sense — is equally important. Strategic linking between pages on your own site:

• Distributes authority from strong pages to weaker ones
• Builds topic clusters supporting topical authority
• Facilitates crawling and indexing of new pages

What to avoid?

Google penalizes manipulative link building practices, which can result in an algorithmic penalty (ranking drop) or a manual action (removal from the index):

• Buying links — paying for links to manipulate rankings
• Link farms (PBN) — networks of sites created solely for linking purposes
• Mass link exchanges — "you link to me, I link to you" on a large scale
• Automated link generation — spam comments, low-quality directory submissions
• Links with hidden anchor text — hiding links from users

How to measure link building effectiveness?

• Domain Rating — DR growth in Ahrefs indicates rising authority
• Referring domains — the number of unique domains linking to the site
• Referral traffic — traffic from external links in Google Analytics
• Target keyword positions — ranking improvement of pages receiving new links
• Google Search Console — the "Links" report shows who links to your site

Related Terms

• Backlink — an inbound link, the unit result of link building
• Domain Rating — metric measuring domain link profile strength
• Off-page SEO — off-site activities, of which link building is the key element
• Anchor text — the clickable text of a hyperlink
• Nofollow — an HTML attribute limiting authority transfer
• Topical authority — topical authority, built in part through links from industry sources