First, a quick reminder of two terms that are essential for understanding how SEO works.
What is link building?
Link building is one of the three pillars of SEO (along with content and technical aspects), a technique that involves acquiring links from external websites that point to yours. This allows Google to perceive your site as more trusted and relevant in its field, increasing its visibility in search results.
To put it simply, think of links as votes saying "this site is okay"—the more reputable sites in a similar niche point to you, the more authority you gain in the eyes of search engine algorithms. Quality backlinks from relevant sources are crucial, as poor ones can lower your rankings.
Link building strengthens a domain's authority, attracts new visitors, and creates a lasting online presence. Without it, even the best content can get lost in the crowd, because how would readers know about it? One good link from a respected domain can be worth more than dozens or even hundreds of links from low-value sites, often considered spammy. It's worth keeping this in mind when building your website's link profile.
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What is domain authority?
Domain authority (often abbreviated as DA) is a special metric that shows how strong and trustworthy your website is in the SEO world – the higher it is, the better it performs in Google rankings.
Authority evaluates a domain's reliability based on fundamentals such as the number and quality of incoming links from other sites. The scale typically runs from 1 to 100 – sites with a score above 50 have an advantage over weaker rivals because search engine algorithms treat them as experts in their field.
It's important to remember, however, that domain authority isn't an official Google metric. It can be defined as a secondary metric used by external tools (such as Moz, Ahrefs, Senuto, and many others) to roughly assess the "strength" of a given domain. Therefore, it's not a definitive guide – but it certainly indicates a similar state of affairs and is widely used by SEO specialists.
What influences domain authority?
- quality of backlinks from external sites,
- domain age and history,
- quality of content on the website and internal linking.
Free linking, or how to help your domain
Since the foundation of link building is building a relevant link profile based on domains with high authority in a given field, as a website owner, you should acquire such links. For more advanced SEO activities , it may be necessary to use special exchanges and purchase links on the online marketplace.
However, it's always worth starting with completely free mechanics—meaning those that only require a little investment of energy. Basic methods include:
Create good content and people will share it
The simplest and yet most difficult method. Write articles, infographics, or guides that others will share if they find them valuable—digital social proof in all its glory. This was Google's default approach, and it still works today, but you can't count on organic link growth in "serious" SEO efforts.
In recent years, the mechanics of how we use the internet and how we consume and publish content have changed significantly. Blogs and small homepages, as "their own little corner of the web," have been relegated to an expert niche and are rarely the primary channel for disseminating information to their audiences.
You will get the most shares on social media, which have a low impact on SEO (links from Facebook or LinkedIn attract traffic and build broadly understood digital recognition, but do not improve domain authority).
Guest blogging. Write guest articles on other people's blogs with a link back to yours.
A very popular and effective method, especially for small creators. You can create an article in your field and propose that the owner of another website publish it in exchange for a link. They gain valuable content, and you gain a link – a win-win situation.
Collaboration. Link exchange with partners
If you want to avoid commercial link exchanges, you can always propose a link exchange with website owners in your industry, preferably of a similar size. Often, simply adding links to an existing article is enough.
Free links – what to watch out for?
Below you will find the most important tips in a nutshell.
Remember about link attributes
Dofollow (sometimes called just follow) and nofollow links are two types of external links that differ in how search engines like Google treat them for SEO purposes.
A dofollow link is a standard link without any special attributes. Search engine robots follow it and transfer some of the "power" (link juice) from the source page to your website. This strengthens the domain's authority and helps you rank higher in search results.
A nofollow link has the rel=”nofollow” attribute, which tells web bots: “Do not follow this link and do not provide SEO value.” Often found in social media, comments, or sponsored content, it does not directly build authority, although it does generate traffic and diversify a link profile.
This means that in an SEO-focused link exchange, in the vast majority of cases you need an external dofollow link pointing to your website.
Monitor links after publication
It's possible that after agreeing to an exchange with a given website, links to your site will disappear unnoticed after a while. That's why it's always worth agreeing on a minimum link publication time (ideally, indefinitely) and checking periodically to make sure nothing has changed. In an exchange where you're the only one linking, you'll likely lose out.
Frequently asked questions about free link building
It's the process of acquiring backlinks to your website without incurring direct fees for their publication (e.g., without purchasing sponsored articles). It relies primarily on exchanging value, creating engaging content, and building relationships with other creators and website owners in your industry.
Proven, free techniques include:
- Guest posting: Writing valuable content for other blogs in exchange for a link to your site.
- NAP Business Listings and Directories: Create company profiles in trusted industry directories and maps (e.g., Google Business Profile).
- Link baiting: Creating such unique and comprehensive content (reports, research, infographics) that other users naturally link to them as a valuable source of knowledge.
- Activity on forums and groups: Providing substantive answers to user questions, supported by a link to a more detailed study on your blog.
Financially, you don't pay for the mere act of placing a link. However, it does require a significant investment of time and commitment. It requires research (finding relevant sites), outreach (establishing contact with publishers), and the creation of high-quality content (e.g., writing an expert guest article), which in itself constitutes a "cost."
This is a very clever and effective strategy. It involves searching for so-called "dead links" (links leading to pages that return 404 errors) on related pages. When you find such a link, you contact the site administrator, inform them of the broken link, and gently suggest replacing it with a link to your working, substantive article on a similar topic. Both parties benefit.
Yes, but only if acquired with care. The vast majority of such links are Nofollow, meaning they don't directly convey "positioning power" (link juice). However, they are absolutely essential for building a natural-looking link profile. The most important rule is that the comment must add real value to the discussion – otherwise, it will be considered spam and deleted.
External links are one of the most important ranking factors for Google's algorithms. The search engine treats links from trusted sites as virtual "voices of support." Effective link building builds domain authority, which directly translates into higher and more stable rankings for your website in organic search results.
Summary
The above article covers the following topics:
- Link building is the process of acquiring valuable links from external websites, which builds a website's authority and increases its visibility in search results.
- Domain authority is an auxiliary indicator of a website's strength and credibility in search engines, built mainly on the quality of external links and content.
- Free link building involves acquiring links yourself by creating valuable content, publishing guest articles, and exchanging links with other websites.
- Effective free link building requires acquiring dofollow links, which convey SEO power, and regularly monitoring their presence on partner websites.
