What is a Backlink?

A backlink (also called an inbound link) is a hyperlink from an external web page to a page on your site. In the context of SEO, backlinks are considered "votes of confidence" between websites: when one site links to another, it is effectively recommending it.

Google has used backlinks as one of the main domain authority factors since the creation of the PageRank algorithm in 1998. The more quality backlinks a page has, the more likely it is to rank well.

Not all backlinks are equal: a link from a reputable source like The New York Times carries much more weight than 100 links from generic directories.

Backlinks transfer authority (known as link juice) from one page to another. Their value depends on several factors:

1. Authority of the source domain: Links from high-authority domains (high DR/DA) are worth more.
2. Thematic relevance: A link from a blog in the same sector is more valuable than an irrelevant one.
3. Anchor text: The link text gives Google clues about the topic of the destination page.
4. Link position: Links in the body of the article carry more weight than those in the footer or sidebar.
5. Attributes: Dofollow links transfer authority; nofollow links (added in 2005) do not directly, but they do generate traffic.
6. Naturalness: A link profile should appear natural, with a variety of sources, anchors, and contexts.

Best practices for ethical (white hat) link building include:

• Quality over quantity: 10 backlinks from DR50+ domains are worth more than 1000 from generic directories.
• Relevance: Prioritise links from sites in the same sector or niche.
• Digital PR: Create newsworthy content and conduct outreach to journalists and industry blogs.
• Linkable content: Comprehensive guides, original studies, infographics, and free tools naturally attract links.
• Guest posting: Guest articles on quality blogs (never on link farms).
• Broken resources: Identify broken links on sites in your niche and offer your content as an alternative.
• Diversification: Mix link types (text, image), anchors (exact match, branded, URL), and sources.
• Monitoring: Regularly review your link profile with Ahrefs, Majestic, or Semrush and disavow toxic links.

A B2B SaaS startup wants to improve its authority. Backlink strategy:

1. Month 1: They publish an original study with their own data on industry trends → 15 mentions in specialised media.
2. Months 2-3: Proactive Digital PR, pitching to 50 journalists → they secure 8 links from DR70+.
3. Month 4: They publish a comprehensive 5,000-word guide → it becomes a reference and generates organic links.
4. Months 5-6: Outreach to industry blogs with collaboration proposals → 20 quality guest posts.

Result: Domain Rating increased from 25 to 58 in 6 months, organic traffic +240%, 3 main keywords in the Top 3.