Link Building for SEO: How to Build High-Quality Backlinks
Link building is still an important part of search engine optimisation, but the way it should be done has changed. Modern backlink acquisition is less about chasing volume and more about earning relevant, trustworthy links that support your broader SEO strategies.
The strongest links tend to come from useful content, genuine relationships, digital PR, expert contributions and websites that have a real reason to reference you. Done well, earning backlinks can support search engine rankings, referral traffic, brand visibility and organic traffic. Done badly, it can leave you with an unnatural backlink profile and unnecessary risk.
In this guide, we explain how earning links works today, what makes a good backlink, which tactics are still worth using and which ones to avoid.
What Is Link Building?
Link building is the process of earning hyperlinks from other websites to pages on your own site. Those links are often called backlinks or inbound links, while the sites providing them are referring domains.
Search engines use links as one of many signals to understand relationships between pages and websites. A relevant website choosing to reference your content can indicate that the page is useful or worth citing.
A backlink can also create a hyperlink referral that sends users directly to your site, which means a valuable link can contribute both SEO value and referral traffic.
Why Backlinks Matter
Backlinks can support organic search visibility when they come from credible and relevant sources. They can also:
- help search engines discover pages;
- send referral traffic;
- strengthen brand visibility;
- expose your business to new audiences; and
- support authority around important topics.
However, backlinks are only one part of search engine optimisation. Strong content, technical SEO, search intent and site structure still matter.
What Makes a High-Quality Backlink?
Relevance
The linking site should have a logical relationship with your business, industry or topic. A link from an industry association, trade publication or respected local organisation usually makes more sense than one from an unrelated website.
Editorial placement
A strong backlink is often added because the publisher believes the destination helps the reader. That is very different from links inserted automatically or bought in bulk.
Authority and trust
SEO tools use metrics such as Domain Authority, Domain Rating and Authority Score to estimate the relative strength of websites. These can be useful when comparing prospects, but none of them is a Google ranking factor.
Do not choose links based on Domain Authority alone. A smaller specialist website with a real audience can be more valuable than a high-metric site that has no topical relevance.
Context and anchor text
Anchor text is the clickable text used in a hyperlink. Descriptive anchor text helps users understand where the link goes, but trying to force exact-match anchor text into every backlink can create an unnatural link profile.
A healthy backlink profile normally includes branded anchors, URLs, page titles and natural descriptive phrases.
Backlinks vs Internal Links
Backlinks come from other websites, while internal links connect pages on your own site.
Internal linking helps search engines discover pages and understand your site structure. It also helps users move between related topics.
Backlink Strategies That Still Work
1. Create Linkable Assets
Content creation is one of the most reliable foundations for earning links. Useful assets can include:
- original research;
- industry statistics;
- surveys;
- calculators;
- templates;
- detailed guides;
- case studies; and
- original graphics.
A well-researched blog post can attract backlinks if it gives other writers something worth referencing. This is where content marketing and earning backlinks overlap most naturally.
2. Use Digital PR
Digital PR can earn authority links by giving journalists and publishers something newsworthy to cover.
This could be original data, expert commentary, industry analysis or a timely story. Unlike mass outreach, digital PR focuses on creating a genuine reason for a publisher to mention and link to your brand.
3. Run a Backlink Audit
A backlink audit helps you understand your current backlink profile before you start active outreach.
Review:
- your strongest referring domains;
- lost links;
- pages attracting the most backlinks;
- suspicious or irrelevant links; and
- the anchor text distribution across your link profile.
Google Search Console provides basic link data, while SEO tools such as Ahrefs and Semrush offer deeper analysis.
4. Analyse Competitor Backlinks
Competitor research can reveal websites that already link to similar businesses or content.
Tools such as Ahrefs Content Explorer can help with link prospecting by showing content that attracts links within your topic. Content Explorer can also surface journalists, publishers and websites that may be relevant to outreach.
The goal is not to copy every competitor backlink. Look for patterns and understand why the link was earned.
5. Try Broken Link Building
Broken link building involves finding dead outbound links on relevant websites and suggesting a useful replacement from your own site.
It works best when your page is genuinely a strong substitute. A generic email asking for a link simply because you found a broken URL is unlikely to perform well.
6. Use Guest Posts Carefully
Guest posts can still be useful when they involve genuine expertise and a relevant audience.
Guest blogging works best when the purpose is to contribute useful information, not to manufacture keyword-rich links. Occasional, high-quality guest posts on reputable industry sites can support visibility and relationships.
Large-scale guest blogging campaigns built purely around backlinks are much closer to manipulative link schemes.
7. Use Email Outreach Strategically
Email outreach can support active backlink acquisition, but it needs a clear reason for the recipient to care.
Good email outreach is personalised, concise and relevant. You might contact a publisher because:
- you have original data they may want to reference;
- you can provide expert commentary;
- their article contains a broken resource;
- your research adds something useful to an existing guide; or
- they mentioned your brand without linking.
The strongest outreach campaigns focus on value rather than simply asking, “Can you link to us?”
8. Reclaim Lost and Unlinked Mentions
If another website mentions your company, research or employee without linking, it may be worth asking whether a link could be added for readers.
You should also monitor lost backlinks. If an old URL has been removed, restoring the content or redirecting it to the closest relevant page may recover that value.
What Is White Hat Link Building?
White hat link building focuses on earning links through useful content, genuine outreach, PR, relationships and legitimate business visibility.
It fits naturally within broader digital marketing and content marketing because the activity is useful even if search engines are removed from the equation.
By contrast, black hat tactics are designed primarily to manipulate search engine rankings. Black hat link schemes often rely on automation, paid placements, link farms, private networks or large-scale exchanges.
White hat link building is slower, but it creates a far healthier backlink profile and far less risk of a Google penalty.
Link Building Tactics to Avoid
Buying links for rankings
Paying for a backlink specifically to manipulate organic search is risky. Paid partnerships and sponsorships can be legitimate, but paid links should be appropriately qualified.
Excessive link exchanges
Natural reciprocal links happen. Building dozens of “you link to me and I’ll link to you” arrangements is different.
Automated backlink packages
Services promising hundreds or thousands of links for very little money usually prioritise quantity over quality.
Low-quality directories and link farms
Some local and industry directories are useful. Generic directories created mainly to sell links are not.
Over-optimised anchor text
Repeated commercial anchor text can make a backlink profile look manipulated.
The Skyscraper Technique: Does It Still Work?
The Skyscraper Technique involves finding content that already earns backlinks, creating something substantially better and then approaching websites that linked to the original resource.
The concept can still work, but simply making an article longer is not enough. The new resource needs to add real information gain, better data, clearer structure or more useful insight.
How to Evaluate a Link Prospect
Before pursuing a backlink, ask:
- Is the site relevant to my audience or industry?
- Does it publish genuine content?
- Does it appear to have a real audience?
- Is the page indexed and visible in organic search?
- Would customers trust the site?
- Does the link make sense in context?
- Would I still want the link if it had no SEO value?
You can use Domain Authority, Domain Rating and Authority Score as supporting metrics, but never as the only decision criteria.
How Many Backlinks Do You Need?
There is no fixed number.
Instead, compare the first page of search results for your target terms. Look at the referring domains and backlink profile of competing pages, but also compare content quality, topical relevance and overall site strength.
One high-quality backlink from a relevant publication may be more useful than dozens of weak links.
How to Measure Link Building Performance
Measure more than raw backlink counts.
Useful metrics include:
- new referring domains;
- quality and relevance of authority links;
- referral traffic;
- organic traffic;
- changes in search engine rankings;
- links pointing to priority pages;
- brand mentions; and
- conversions influenced by organic search.
Google Search Console can provide a basic view of links to your site, while backlink audit tools can help monitor new and lost links over time.
Can Bad Backlinks Cause a Google Penalty?
Manipulative link schemes can create problems and, in serious cases, contribute to a Google penalty or manual action.
However, most sites naturally attract some spammy links over time. You generally do not need to panic about every strange backlink.
A Google penalty risk becomes more relevant when there is a clear pattern of deliberate manipulation, such as paid links, link networks or large-scale artificial campaigns.
Does Link Building Matter for AI Search?
Links and brand mentions across authoritative websites can contribute to a broader digital footprint, which matters as discovery expands beyond traditional search engines.
AI systems may surface information from publishers, forums, research and authoritative sources where brands are mentioned or cited. That makes genuine coverage and useful content increasingly valuable across both SEO and AI search.
A Better Approach to Link Building
A strong strategy should not begin with “How many backlinks can we get?”
A better question is: “Why would a reputable website want to reference us?”
That usually leads to better content, stronger relationships, more useful PR and a healthier link profile.
If you need help building a stronger organic search strategy, explore our SEO services, or book a strategy meeting with the eCBD team.
Frequently Asked Questions
Does link building still work?
Yes. High-quality backlinks can still support search visibility, referral traffic and authority when they come from relevant, trustworthy sources.
What is a backlink?
A backlink is a hyperlink from another website to a page on your site.
What is broken link building?
Broken link building is the process of finding dead links on relevant websites and suggesting a useful replacement resource.
Are guest posts good for SEO?
Guest posts can be valuable when they provide genuine expertise to a relevant audience. Large-scale guest posting solely to create backlinks is far less useful and may become manipulative.
What is Domain Authority?
Domain Authority is a third-party metric created to estimate the relative ranking strength of a website. It is useful for comparison but is not a Google ranking factor.
Should I buy backlinks?
Buying links specifically to manipulate search rankings is not recommended. Paid partnerships should be handled transparently and appropriately qualified.
