Backlink

Definition

Backlink - A link from one website to another. Backlinks from authoritative, relevant websites act as votes of confidence and are one of Google's most important ranking signals. Not all backlinks are equal - context, authority, and relevance all matter.

In more depth

Backlinks are the backbone of Google's original ranking innovation. PageRank - the algorithm Larry Page patented in 1998 - was built on the insight that a link from one page to another is a vote of confidence. Pages with more high-quality votes would outrank pages with fewer. More than 25 years later, links remain one of the most powerful ranking signals in Google's algorithm.

What's changed dramatically is quality thresholds. In the early days, volume mattered most. Today, a single link from a relevant, authoritative Australian trade publication can be worth far more than a large batch of links from low-quality directories or private blog networks. Google's spam detection systems have become highly sophisticated at identifying manufactured links and either ignoring them or actively penalising the sites they point to.

For Australian businesses, the most valuable backlinks come from: AU-specific news sites and trade publications, industry association directories (especially .org.au domains), government and educational resources (.gov.au and .edu.au), and highly relevant niche blogs and forums with genuine readership. A diverse portfolio of these link types compounds in value over time.

Related terms: Link Building - Authority (Domain Authority / Domain Rating) - Anchor Text - PageRank - White Hat SEO

Frequently asked questions

How many backlinks do I need to rank?

There's no fixed number - it depends entirely on your competition. The real question is whether your backlink profile is stronger than the pages currently ranking for your target keywords. Use tools like Ahrefs or Semrush to compare your domain's link strength against ranking competitors.

Can backlinks hurt my rankings?

Yes, if they come from link schemes, private blog networks, or paid link placements. Google's spam updates regularly devalue or penalise manipulative link patterns. Legitimate backlinks earned through genuine outreach and quality content are safe. If you've acquired bad links in the past, the Disavow tool lets you ask Google to ignore them.