If you're new to SEO, you've probably heard that "backlinks are important" without really understanding what they are. This guide explains backlinks in plain English, shows you real examples, and helps you understand why they matter for your website's success.
Simple Definition of a Backlink#
A backlink is a link from one website to another website.
That's it. When Website A includes a clickable link that takes users to Website B, that creates a backlink for Website B.
Think of it like a citation in an academic paper. When a researcher references another study, they're crediting that work and directing readers to it. Backlinks work the same way on the web.
The Technical View#
For those who want to understand the code, here's what a backlink looks like in HTML:
<a href="https://example.com/page">This is the anchor text</a>
Breaking this down:
<a>- The anchor tag that creates a clickable linkhref="..."- The destination URL (where the link points)- Anchor text - The visible, clickable words users see
When another website publishes this code pointing to your website, you've received a backlink.
Visual Example#
Imagine you're reading an article on TechCrunch about software tools. The article mentions "according to research from [Your Company]..." where "Your Company" is a clickable link to your website.
That clickable text is a backlink to your site. TechCrunch is the referring domain, and your site is the destination.
Backlink vs Internal Link vs Outbound Link#
These terms often cause confusion. Here's how they differ:
| Link Type | Definition | Example | |-----------|------------|---------| | Backlink (Inbound Link) | A link from another website to yours | TechCrunch links to your blog | | Internal Link | A link between pages on the same website | Your homepage links to your pricing page | | Outbound Link (External Link) | A link from your website to another site | You link to Wikipedia as a source |
The same link can be described differently depending on perspective:
- From your perspective: TechCrunch linking to you = backlink
- From TechCrunch's perspective: Their link to you = outbound link
For a deeper comparison, read Internal vs External Links Explained.
Why Search Engines Care About Backlinks#
When Google was founded in 1998, its key innovation was using links as a ranking signal. The founders observed that academic papers are judged partly by how often other papers cite them. They applied this logic to web pages.
The Original Insight#
Larry Page and Sergey Brin realised that:
- Links are endorsements: When someone links to a page, they're saying it's worth reading
- Not all endorsements are equal: A link from Harvard.edu carries more weight than a link from a random blog
- Links can be analysed at scale: An algorithm could evaluate millions of links to determine page quality
This became PageRank, the algorithm that made Google dominant.
Modern Relevance#
While Google's algorithms have grown vastly more sophisticated, backlinks remain a core ranking signal. Here's why:
They're difficult to fake at scale: Creating thousands of high-quality, editorial backlinks is genuinely hard. This difficulty makes them a reliable quality signal.
They represent human judgement: Unlike metrics that can be gamed, a link from a respected publication reflects a human editor's decision to reference your content.
They indicate relevance: Sites in your industry are more likely to link to relevant content, helping Google understand what topics your site covers.
Google has confirmed multiple times that backlinks remain among the most important ranking factors.
What Makes a Backlink Valuable?#
Not all backlinks are created equal. Here are the factors that determine a backlink's value:
1. Source Authority#
A link from The New York Times carries more weight than one from a brand-new blog. Authoritative sites have earned their reputation through quality content and their own strong backlink profiles.
How to assess authority:
- Does the site have real traffic?
- Does it rank for competitive keywords?
- Is it recognised in its industry?
- What does its own backlink profile look like?
2. Relevance#
A link from a related website is more valuable than one from an unrelated site. If you run a fitness blog, a link from a health magazine is more valuable than one from an automotive site.
Relevance operates on multiple levels:
- Domain relevance: Is the overall site topically related?
- Page relevance: Is the specific page about a related topic?
- Contextual relevance: Does the surrounding text relate to your content?
3. Link Placement#
Where a link appears on the page affects its value:
High value:
- Within the main content body
- Surrounded by relevant text
- Prominent position (early in the article)
Lower value:
- In sidebars or footers
- Buried in long lists of links
- In navigation menus
4. DoFollow Status#
Links can have different attributes that affect how search engines treat them:
- DoFollow (default): Passes SEO value
- NoFollow: Suggests search engines not count it
- Sponsored: Identifies paid relationships
- UGC: Identifies user-generated content
DoFollow links are most valuable for SEO, though a natural profile includes various types.
Learn more in our guide to DoFollow vs NoFollow Links.
Quick Checklist: Is This a Good Backlink?#
When evaluating a potential backlink, ask:
- [ ] Is the linking site relevant to my industry?
- [ ] Does the site have genuine traffic?
- [ ] Is the site trustworthy and well-maintained?
- [ ] Will the link appear within editorial content?
- [ ] Is the link dofollow (or at minimum, from a quality source)?
- [ ] Does the surrounding content relate to my page?
A "yes" to most of these questions suggests a valuable backlink.
Real Examples of Backlinks#
Let's look at three common scenarios where backlinks occur:
Example 1: Editorial Mention in a News Article#
Scenario: A technology journalist writes about industry trends and references a study your company published.
What it looks like: "According to research from [Your Company], 73% of marketers plan to increase their content budget..."
Why it's valuable:
- Editorial endorsement (the journalist chose to cite you)
- High-authority source (news publication)
- Contextually relevant (within related content)
- Natural anchor text (your brand name)
Example 2: Resource Page Inclusion#
Scenario: An industry blog maintains a "Best Resources for Marketers" page and includes your tool.
What it looks like: A curated list where your tool appears alongside others, with a brief description and link.
Why it's valuable:
- Targeted relevance (resource pages attract interested visitors)
- Evergreen placement (resource pages are maintained long-term)
- Contextual fit (surrounded by related resources)
Example 3: Guest Post Attribution#
Scenario: You write a guest article for an industry publication, and your author bio includes a link to your website.
What it looks like: "About the Author: [Your Name] is the founder of [Your Company], where they help businesses..."
Why it's valuable:
- Quality publication exposure
- Establishes expertise and credibility
- Drives targeted referral traffic
- Builds relationship with the publication
How to Find Your Backlinks#
Discovering who links to your website helps you understand your backlink profile and identify opportunities.
Method 1: Google Search Console (Free)#
Google Search Console shows the links Google knows about:
- Log into Search Console
- Navigate to "Links" in the left sidebar
- View "Top linking sites" and "Top linking text"
Pros: Free, directly from Google Cons: Limited data, no metrics beyond link count
Method 2: SEO Tools (Freemium/Paid)#
Specialised tools provide comprehensive backlink data:
Ahrefs: Industry-leading backlink database with detailed metrics
Semrush: Comprehensive SEO suite including backlink analysis
Moz Link Explorer: Includes Domain Authority metrics
Ubersuggest: Budget-friendly option with basic backlink data
These tools show:
- Complete backlink lists
- Referring domain metrics
- Anchor text distribution
- New and lost links over time
Not sure which tool is right for you? Browse our list of the best free backlink checkers to find one that fits your budget.
For a detailed walkthrough, see our Backlink Audit Guide.
Frequently Asked Questions#
Do all backlinks help SEO?#
No. Only quality backlinks from relevant, authoritative sites provide meaningful SEO value. Low-quality links from spammy or irrelevant sites may be ignored by Google—or in extreme cases, could raise red flags.
Can backlinks hurt my site?#
In most cases, Google simply ignores low-quality links rather than penalising you for them. However, if you've actively participated in link schemes (buying links, excessive link exchanges, PBNs), you could face penalties.
The good news: natural "bad" links that happen without your involvement rarely cause problems.
How many backlinks do I need?#
There's no universal number. Your backlink requirements depend on:
- How competitive your target keywords are
- What your competitors' backlink profiles look like
- The overall authority of your domain
Generally, focus on quality over quantity. Ten excellent backlinks often outperform hundreds of mediocre ones.
Read more in How Many Backlinks Do I Need?
How long do backlinks take to impact rankings?#
Backlink effects aren't immediate. It can take weeks to months for new backlinks to be discovered, indexed, and reflected in rankings. Link building is a long-term strategy, not a quick fix.
Are backlinks still important in 2026?#
Yes. Despite ongoing algorithm updates and the rise of new ranking factors, backlinks remain among Google's most important signals. Quality backlinks continue to correlate strongly with search rankings.
Summary#
A backlink is simply a link from one website to another. When other sites link to yours, search engines interpret this as a vote of confidence in your content.
Key points to remember:
- Backlinks are links pointing to your site from other websites
- They're one of the most important SEO ranking factors
- Quality matters far more than quantity
- Not all links are equal—relevance and authority matter
- Building quality backlinks takes time but delivers lasting results
Now that you understand what backlinks are, explore our complete backlinks guide to learn about evaluation, strategy, and building your own backlink profile.
What to Read Next#
Deeper understanding:
- Referring Domains vs Backlinks - Why unique domains matter more than link count
- Link Equity Explained - How value flows through links
Ready to build:
- Link Building Strategy Guide - Your complete roadmap
- How to Start Link Building - First steps for beginners