What Is a Backlink? The Complete SEO Guide for Hong Kong (2026 Update)
Many Hong Kong SMEs and online stores run into the same situation: the content is well written and the products are competitive, yet the Google ranking just never makes it onto the first page. More often than not, the missing piece is backlinks. A backlink is one of the core signals search engines use to judge whether a website has authority and is worthy of trust. This guide breaks it down step by step, from the basics upward: what a backlink is, why it affects SEO, how to tell good from bad, how to check them, how to build them, and whether backlinks still matter in the age of AI.
Table of Contents
- What Is a Backlink?
- Why Are Backlinks So Important for SEO?
- Types of Backlinks: Dofollow vs Nofollow
- How to Judge the Quality of a Backlink?
- How to Check a Website’s Backlinks?
- How to Build Backlinks? (White-Hat Strategies)
- Black-Hat Link Tactics and Google Penalties (Must Avoid)
- In the Age of AI, Do Backlinks Still Matter?
- Frequently Asked Questions (FAQ)
- Conclusion: Start With a Professional SEO Strategy
What Is a Backlink?
In the simplest terms: when website A has a link pointing to website B, that link is a backlink from B’s point of view. That’s why a backlink is also called an inbound link — a link from another website that “links back” to yours. Say a blogger places a link to your website inside one of their articles; to you, that link is a backlink.
Why put so much weight on a single link? The simplest analogy is a “vote.” Every backlink is like another website casting a vote for your content, signalling that they recognise and trust your page as worth citing. Search engines look at these “votes” to judge how trustworthy your website is. In fact, backlinks are one of the very cores of Google’s “PageRank” algorithm — in the next section we’ll explain in detail why they matter so much.
Backlink vs Internal Link vs Outbound Link
Many beginners confuse these three kinds of links, but once you’re clear on the “direction,” it all falls into place:
| Link Type | Direction | Role in SEO |
|---|---|---|
| Outbound Link | From your website → to another website | Citing credible sources can raise content quality, but avoid linking to low-quality sites such as content farms or gambling sites |
| Internal Link | From one page of your website → to another page of your website | Helps search engines understand your site structure, lowers bounce rate, and distributes page authority |
| Backlink | Another website → to your website | Equivalent to a vote of trust; the single most important part of off-site SEO for boosting authority and rankings |
Why Are Backlinks So Important for SEO?
To understand how much backlinks matter, we have to start with PageRank, which Google introduced in the 1990s. Back then, Google used the quantity and quality of backlinks to measure whether a page deserved to rank highly. The principle is similar to voting: the more websites that link to you, the more easily you get “elected” to a good ranking on the search results page.
But backlinks aren’t purely a numbers game. The weight of each vote depends on the authority of the voting website itself — a link from a high-authority major site is worth far more than dozens of links from obscure small sites. This is the accumulation and transfer of so-called “authority”: a high-authority website passes part of its trust to you, and your website then ranks more easily for the relevant keywords.
The data backs this up. According to Backlinko’s analysis of over ten million search results, the page ranking first has on average 3.8 times as many backlinks as those ranking 2nd through 10th. On top of that, links are also the main way search engine crawlers discover and index new pages — pages with more backlinks get visited by Google more frequently, and naturally have a better chance of ranking well. To plan your off-site strategy more systematically, see our Link Building 101 Beginner’s Guide.
Types of Backlinks: Dofollow vs Nofollow
Backlinks fall into two main categories based on whether or not they pass SEO authority: Dofollow and Nofollow. Only once you can tell them apart will you know how much a given link actually helps your rankings.
| Attribute | HTML Tag | Passes Authority? | Common Scenarios |
|---|---|---|---|
| Dofollow | Default; no extra markup needed | Yes (passes Link Juice) | In-article citations, resource recommendations, partner links |
| Nofollow | rel=”nofollow” | Generally no (treated as a “hint” since 2019) | Social platforms, forum comments, sponsored or advertising content |
Dofollow Backlinks
Dofollow is the default state of a link and needs no special markup. When another website links to you directly through anchor text — for example <a href="https://yourwebsite.com">anchor text</a> — you receive the SEO authority they pass on (commonly known as Link Juice). This is exactly the type of link we most want to win when doing SEO.
Nofollow Backlinks (Not Useless)
A Nofollow link adds rel="nofollow" to the code, which is like telling search engines not to pass authority to you. Because of this, many people assume Nofollow links have no value — but that’s a common misconception. Since 2019, Google has changed Nofollow from a “mandatory ignore” to a “hint,” and in certain situations it can still bring indirect authority value.
More importantly, a healthy link profile should contain both Dofollow and Nofollow links. If all of your backlinks are Dofollow, it looks overly uniform and unnatural, and can easily raise Google’s suspicion of manipulation. And although Nofollow links don’t pass authority directly, they can bring real referral traffic and brand exposure. So don’t keep overlooking the value of Nofollow.
How to Judge the Quality of a Backlink?
At the end of the day, backlinks are about quality over quantity. Rather than chasing a pile of low-quality links, it’s better to win a few high-quality ones. The following five factors can help you judge whether a backlink is actually worth anything.
Factor 1: Website Authority (DA / PA)
A link from a high-authority website far outweighs a whole pile of small sites. To put it another way, a book recommended by a well-known figure carries far more weight than one recommended by ten thousand ordinary people. The same goes for websites: being shared by 100 obscure small sites may not match a single backlink from Wikipedia. The industry commonly refers to Domain Authority (DA) and Page Authority (PA), developed by Moz, with scores from 1 to 100 — the higher the score, the more weight it carries.
Factor 2: Anchor Text
Anchor text is the text shown on a hyperlink. If the anchor text contains a relevant keyword, Google can more easily understand the topic of the content the link points to, which gives a boost to that keyword’s ranking. But be careful: over-manipulated anchor text that deliberately stuffs the same keyword can easily trigger a penalty from the Penguin algorithm. So anchor text should read naturally and smoothly within the content — don’t force it in.
Factor 3: Topical Relevance
Ideally, the topic of the linking website should be relevant to yours. For example, if you run a sporting goods website and the links come from related sites such as fitness tutorials or running gear reviews, they reinforce your expertise on the topic of “sporting goods” all the more. Conversely, if a backlink comes from a completely unrelated entertainment gossip site or food marketplace, the boost is limited; and accumulating a large number of irrelevant links in a short time may even be judged as deliberate manipulation, dragging down your site’s trust instead.
Factor 4: Link Placement — Contextual Link
Even a link from the same website can be worth more or less depending on where it sits. A “Contextual Link” embedded within the sentences of the main article body usually carries more weight than a sitewide link placed in the footer, header, or sidebar. That’s because when Google judges link quality, it also looks at the text surrounding the link — when a link appears within a highly relevant passage, the search engine understands its relationship to the content more clearly, and the topical relevance and authority it passes are more clearly defined.
Factor 5: Diversity of Link Sources
Getting one link each from 100 different domains is worth far more than getting 100 links from the same website. That’s because backlinks from the same website deliver diminishing returns; and getting 100 different websites to willingly link to you is much harder than manipulating a single site, so Google places more trust in this kind of “multi-domain” link distribution.
How to Check a Website’s Backlinks?
Regularly checking your website’s backlinks is important — partly to confirm the quality of the sources, and partly to guard against “Negative SEO” attacks, where a competitor points a large number of spam links at your website in an attempt to mislead search engines into penalising you. Once you spot suspicious or low-quality links, you can disavow them to Google using the Disavow tool in Google Search Console. Here are several commonly used backlink checking tools:
| Tool | Free / Paid | Main Use |
|---|---|---|
| Ahrefs | Paid (with limited free tools) | Check backlink counts, sources, anchor text, and competitor link analysis |
| Semrush | Paid (with free trial) | Backlink audits, monitoring new/lost links, Authority Score |
| Ubersuggest | Free + Paid | Basic backlink checks, suitable for entry-level users |
| Google Search Console | Free | View the links pointing to your website and use Disavow to reject spam links |
How to Build Backlinks? (White-Hat Strategies)
First, an important premise: rather than constantly thinking about how to add a few more links, get your content right first. When content is good enough and valuable enough, people will naturally cite and share you of their own accord. The following four white-hat methods can help you steadily accumulate quality backlinks.
Method 1: Create Quality, Comprehensive Content
When content is deep and comprehensive enough, readers no longer need to search elsewhere for information. Take an article on “basketball skills tutorials” as an example: if it also covers related sub-topics such as dribbling moves, basic footwork, and training methods, meeting the needs of different readers, its chances of being shared and cited naturally increase greatly.
Method 2: Guest Posting / Off-Site Publishing (Guest Post)
Writing quality articles and submitting them to authoritative websites or well-known media in the same field is currently the most common link-building method. To stand out, remember three things: don’t use a cookie-cutter template, show the uniqueness of your content, and offer topics that are in-depth and professional. Once an article is published, you can usually earn a backlink in the author byline or within the body text.
Method 3: Share on Social Platforms and Forums
Social media and forums are already important traffic sources. While running your website, you can promote articles simultaneously on Facebook and Instagram; you can also post — following the rules — on topic-relevant Hong Kong forums (such as LIHKG and various discussion boards) to build links and exposure indirectly. Just be sure to follow each platform’s guidelines so you’re not treated as spamming or junk messages.
Method 4: Obtain Your Competitors’ Backlink Lists
If a website has cited your competitor’s content, that’s an important lead. You can use tools such as Ahrefs and LinkMiner to find out which websites your competitors’ backlinks come from, then try to win the same linking opportunities. As you review them one by one, watch three things: link relevance, source authority, and whether you have a chance to replicate that same link.
Black-Hat Link Tactics and Google Penalties (Must Avoid)
Link farms, PBNs (Private Blog Networks), and buying large volumes of low-quality links all fall under “black-hat SEO.” These tactics may work in the short term, but the risk is extremely high. Since 2014, Google’s Penguin algorithm has specifically detected and penalised unnatural, spammy links, and once you’re caught, rankings can plummet. This is our consistent stance too: when building and sourcing backlinks, you must use Google-approved, relevant, high-quality sources — never buy a pile of low-quality links just because they’re cheap. To understand the reasonable cost of quality links, see Breaking Down Backlink Costs; and if you’d like to hand it to a professional team, take a look at our Hong Kong SEO Backlink Building and Sourcing Service.
In the Age of AI, Do Backlinks Still Matter?
As the search landscape evolves, keyword matching is no longer the only logic; it’s being joined by Generative Engine Optimization (GEO), Answer Engine Optimization (AEO), and Large Language Model Optimization (LLMO). These three frameworks each value different things, but the core logic is the same: prioritise surfacing content from “high-authority, high-credibility” sources. In other words, backlinks are the “ticket of trust” in the age of AI.
The data supports this direction too. According to a Semrush study of 1,000 domains, a website’s Authority Score is strongly positively correlated with how often it is cited in AI-generated answers. In other words, websites with high-quality backlinks and authoritative sources are more likely to be chosen by AI as reliable reference sources. So whether it’s traditional SEO or AI search, backlinks remain an important foundation of brand authority.
Frequently Asked Questions (FAQ)
What is a backlink?
A backlink is a link from website A pointing to website B; to website B, that link is a backlink. It’s like a vote cast for you by another website, signalling trust in your content, and it’s one of the important factors affecting SEO rankings.
Is buying backlinks safe?
It can be done in moderation when necessary, but relying too heavily on buying links is not recommended. Low-quality links or link farms carry the risk of being penalised by the Penguin algorithm, so you must use high-quality, relevant, Google-approved sources and hand the work to an experienced team to reduce the risk.
Are Nofollow backlinks useful?
Yes. Although Nofollow links generally don’t pass authority directly, since 2019 Google has treated them as a “hint,” and they can bring referral traffic and brand exposure. A natural, healthy link profile should contain both Dofollow and Nofollow links in the first place.
Can you rank without backlinks?
It’s possible for lower-competition keywords, but highly competitive keywords almost always require backlinks. They’re one of Google’s three major ranking factors, and can’t be ignored in the long run.
How many backlinks does a website need?
There’s no fixed number. The point is quality, not quantity — links that are diverse in source, topically relevant, and high in authority matter far more than simply chasing volume.
Conclusion: Start With a Professional SEO Strategy
Let’s recap the five key points: backlinks are essentially a “vote of trust”; links come in Dofollow and Nofollow, and a healthy profile has both; judging quality means looking at authority, anchor text, topical relevance, link placement, and source diversity; link building should follow the white-hat path; and even in the age of AI, backlinks remain the ticket of trust for brand authority. For Hong Kong businesses and online stores, building backlinks must be strategic, quality-focused, and free of black-hat traps. If you’d like to hand this over to a professional team, First Page’s SEO team can tailor a Link Building and backlink building/sourcing plan for you — feel free to get a free consultation and quote, and start with a professional SEO strategy to boost your search rankings together.
Last reviewed and updated on 24/07/2026.
