What Are Backlinks in SEO? The Complete Beginner’s Guide (2026)

The first time I heard the words what are backlinks I thought it was just another SEO buzzword. I ignored it for about four months while I focused on writing articles for Peplio. Four months later — zero rankings, near-zero traffic. When I finally dug into why, the answer was clear: every competitor ranking above me had backlinks. I had none. That mistake cost me months.

This guide answers what are backlinks completely — and more importantly, what are backlinks worth to your rankings — not just the definition, but why Google treats them as the most powerful ranking signal it has, which types actually move rankings in 2026, and what you can realistically do to start building them from scratch without a budget. If you are still laying your SEO foundation, start here first: What Is SEO and Why Is It Important. Once you have that context, this guide will make complete sense.

What Are Backlinks in SEO? (The Simple Definition)

Before we get into tactics, let us answer the core question: what are backlinks exactly? A backlink is a link from one website pointing to another website. When an external site links to a page on your site, that is a backlink for you. The easiest way to understand what are backlinks is to think of them as citations.

Imagine you wrote a research paper. If ten other researchers cite your paper in their own work, that is evidence your paper is credible and worth referencing. Google thinks about backlinks almost identically — every link from another site to yours is a vote of confidence.

The more authoritative the site casting that vote, the more valuable it is. That is the short answer to what are backlinks. A real example: if the Moz blog links to one of my Peplio articles, Google sees a high-authority site vouching for my content. That single link from Moz does more for my rankings than 100 backlinks from random low-quality directories. Quality matters far more than quantity — and that is the core of what makes backlinks complicated to build correctly.

Why Backlinks Matter to Google — and to AI Search in 2026

Google’s original algorithm — PageRank, created by Larry Page and Sergey Brin at Stanford in 1998 — was built entirely around backlinks. The insight was simple: a page that many other pages link to is probably more valuable than one nobody links to. 27 years later, backlinks are still the single most powerful off-page ranking signal Google uses. Once you understand what backlinks are, the next question is why Google cares about them so much. Here is why Google still relies on them so heavily in 2026:

They are hard to fake at scale. Anyone can write keyword-optimised content. Anyone can fix their meta tags. But earning genuine editorial backlinks from real websites requires content good enough that others want to reference it. Google trusts backlinks precisely because manufacturing them at scale is difficult and detectable.

They pass authority between sites. When a high-authority site links to yours, it passes a portion of its authority to your page. This directly improves your ability to rank. Pages in position 1 on Google have 3.8x more backlinks on average than pages in position 10 — that gap reflects real authority differences, not luck.

They help Googlebot discover content faster. When a well-crawled, established site links to your new article, Googlebot follows that link and finds your page quickly. For new sites, a backlink from an indexed domain can cut the time to first indexing from weeks to days.

They now affect AI search visibility too. This is the 2026 update that most guides miss. Google AI Overviews, ChatGPT Search, and Perplexity all bias heavily toward sources with strong backlink profiles when deciding which pages to cite. 96% of pages cited in AI-generated answers have established backlink profiles. If you want to appear in AI search — not just traditional rankings — backlinks are not optional. For a full breakdown of how to optimise for AI search, see our guide on What Is Generative Engine Optimization.

Types of Backlinks — Every Type Explained

Now that you know what backlinks are, you need to understand the different types before you start building them. Some types directly improve your rankings. Some do nothing. Some can trigger a Google penalty. Here is every type you need to know:

Dofollow vs Nofollow Backlinks

This is the most important distinction for anyone learning what are backlinks for the first time — and it is what separates useful links from useless ones.

Dofollow backlinks are what you want to build. They are the only type that directly passes authority and moves your rankings. Nofollow, sponsored, and UGC links still have indirect value — they drive referral traffic and create a natural-looking link profile — but they do not directly improve where you rank.

Types of Backlinks by Source

Editorial backlinks — The gold standard of what are backlinks in practice. A journalist, blogger, or content creator links to your page because they genuinely found it useful or cited it as a source. These are the most valuable backlinks possible. They are earned entirely on content quality, almost always dofollow, and impossible to fake. Getting them requires building content genuinely good enough that others want to reference it.

Guest post backlinks — When people ask what are backlinks they can actually build as a beginner, guest posts are the answer. You write a full article for another website in your niche and include a contextual link back to your own site. This is the most reliable white-hat link building method available in 2026 — as long as the guest post is genuinely good content on a relevant site, not thin filler placed purely for the link.

Resource page backlinks — Many websites maintain “useful resources” or “recommended tools” pages in their niche. Getting listed on a relevant resource page earns a dofollow backlink and consistent referral traffic. Outreach is straightforward: find the page, check your content fits, email the site owner with a specific reason why your page adds value to their list.

Broken link backlinks — Another highly effective answer to what are backlinks worth chasing. Find a broken link on a relevant site, identify what the dead page covered, create content on that topic, and email the webmaster suggesting your page as a replacement. High effort, but effective because you are solving a real problem for the site owner rather than asking a favour.

Pinterest backlinks — Pinterest links are dofollow. Every pin you create with a link back to your article is a dofollow backlink from a domain with authority over 90. This takes 5 minutes per article and is one of the most underused quick wins available to solo bloggers.

Good Backlinks vs Bad Backlinks

One of the most important lessons I learned the hard way is that not all backlinks are equal — and when someone asks what are backlinks worth, the answer depends entirely on quality. — and some actively damage your rankings. Google’s Penguin algorithm, which runs in real-time since 2016, specifically targets manipulative link building. After Google’s October 2025 spam update, it is better than ever at identifying low-quality links.

The rule of thumb: if a backlink was easy to get at scale, it either does not help or actively hurts. Real editorial links are hard to earn — that difficulty is exactly why Google trusts them.

How to Build Backlinks as a Beginner in 2026

I built every backlink Peplio has with zero budget. If you understand what backlinks are and want to start earning them, here is exactly what works in 2026:

1. Create Content Worth Linking To

Before any outreach tactic, ask honestly: is there anything on my site another website would genuinely want to reference? The best link magnets are original data or case studies, genuinely comprehensive guides, free tools, and specific expert opinions backed by evidence. My free SEO tools page and detailed SEO guides get the most organic backlinks on Peplio because they are genuinely useful. Build something worth linking to first — outreach without good content is wasted effort.

2. Guest Posting on Relevant Blogs

Guest posting is still the most reliable link building method for beginners. Find blogs in your niche that accept contributions — search Google for “your niche” + “write for us”. Read their existing content to understand what their audience needs. Pitch a specific, well-researched article idea rather than a vague offer.

Write the best article you possibly can. Include one natural contextual link back to a relevant page on your site. The key word throughout is relevant — a guest post on a digital marketing blog linking to Peplio carries real weight. A guest post on an unrelated blog does not.

3. Pinterest — Dofollow Backlinks in 5 Minutes

Most SEO guides skip Pinterest entirely. They should not. Pinterest links are dofollow from a domain with authority over 90. Every pin you create with a link back to your article is a genuine dofollow backlink. Create a Pinterest business account, make a vertical pin for every article you publish, and link it back to your site. Five minutes per article, zero cost, and Pinterest also drives real referral traffic particularly for visual content and how-to guides.

4. Broken Link Building

Find a broken link on a relevant website in your niche using Ahrefs’ free broken link checker. Identify what content the dead link was pointing to. Create a page on that topic. Email the webmaster: tell them the link is broken, explain what it was pointing to, and suggest your content as a replacement. Most webmasters appreciate the heads-up and a percentage will update the link. High effort but high conversion rate because you are solving their problem.

5. Internal Links — Not Backlinks, But They Work Similarly

Internal links between your own pages are not backlinks — but they pass ranking authority between your pages in a similar way. Every new article you publish should link to 2–3 existing articles on your site with descriptive anchor text.

This helps Googlebot discover your content and distributes authority to your most important pages. For the full picture of how this fits into your site architecture, see our guide on technical SEO for beginners.

What No Longer Works After Google’s Spam Updates

Understanding what backlinks are is only half the picture — you also need to know which backlink tactics are now dead or dangerous. After Google’s October 2025 spam update — the most aggressive link spam crackdown in recent years — these tactics are either completely dead or actively dangerous:

• Web 2.0 backlinks — creating Tumblr, Blogger, or Weebly profiles with links back to your site. Google ignores these entirely.
• Generic directory submissions — submitting to random web directories. Unless it is a genuine, editorially reviewed industry directory, this achieves nothing.
• Forum profile links — creating accounts on random forums to put your link in the profile. All nofollow, all ignored.
• Blog comment links — commenting on blogs with your URL. Nofollow across the board, looks spammy, zero SEO value.
• Private blog networks (PBNs) — networks of sites created solely to link to each other. Google deindexes these regularly. Anyone selling PBN links is selling you a penalty.
• Undisclosed paid links — buying dofollow links from link sellers without the sponsored attribute. Google detects these patterns and issues manual penalties.

For a full breakdown of what counts as off-page SEO and what has changed, see our guide on types of SEO.

How to Check Your Backlinks for Free

Before building new backlinks, check what you already have. Knowing what backlinks are pointing to your site is the starting point for any link building strategy. These are the best free tools:

For most beginners, Google Search Console is enough. Go to Search Console → Links → External links. This shows every domain linking to your site and which pages they are pointing to. Check this monthly to track growth and spot any suspicious links that could trigger a penalty.

Frequently Asked Questions

My Honest Take on Backlinks After 3 Years of Building Peplio

Backlinks are highly valuable for SEO, but their effectiveness depends on building them correctly. Beginners often either focus on them too soon or neglect them for too long, which can lead to poor rankings, as experienced by those who ignore them initially. The best strategy is to create genuinely useful content first and then consistently apply effective methods like guest posting, Pinterest, and broken link building while being patient, as new sites typically receive few natural backlinks in their first six months.

The compounding effect of backlinks kicks in slowly — but once it does, it is durable in a way that no shortcut ever is. Every spammy backlink tactic I have tried or tested produced either nothing or a temporary rankings drop. Every real editorial backlink I earned has stayed in place and kept contributing to rankings for months.

If you want to understand how backlinks fit into your complete SEO picture — alongside on-page optimisation, technical SEO, and content strategy — read our full breakdown of how SEO works. And for the complete list of free tools that help you track your backlinks, rankings, and overall site health, see the best free SEO tools for beginners.