Link Building

Link building: the pillar of off-page SEO

Link building covers every action aimed at earning quality backlinks to your website. It is the pillar of off-page SEO and one of the three most important ranking factors for Google, alongside content and technical optimisation. According to a Backlinko study, pages in position 1 on Google have on average 3.8 times more backlinks than pages in positions 2 to 10.

The principle is simple: Google reads every link to your site as a vote of confidence. The more votes you receive from recognised, relevant sites, the more Google treats your site as a trustworthy source and places it at the top of the results.

White hat link building strategies

Guest blogging is the most common and the most natural strategy. You write a quality article for a blog or a trade publication in your sector, and earn a link back in the author bio or inside the content. Target sites with a Domain Authority above 30 to maximise the impact. Average success rate: 5 to 15% of approaches lead somewhere.

Linkbaiting means creating content so useful or so original that it attracts links on its own. The formats that work best: statistical studies (journalists love quoting figures), infographics (shared 3 times more than text), free tools (calculators, templates), and definitive guides of more than 3,000 words.

Digital PR targets journalists and bloggers with exclusive data, expert comment, or original angles on the news. A piece in a recognised outlet (Le Monde, BFM, Les Echos) brings a very high authority backlink and brand visibility.

Broken link building means spotting broken links on sites in your sector and offering your content as the replacement. Everybody wins: the webmaster fixes a dead link, and you earn a backlink.

What makes a good backlink

Domain authority (DA/DR) as measured by Moz or Ahrefs: a link from a site at DA 50 or above has a significant impact. Topical relevance: a link from a site in your sector is worth more than an off-topic one. Site traffic: a link from a site with real visitors is worth more than one from a ghost site. Link placement: an editorial link in the body of an article is worth more than one in a footer or a sidebar.

Practices to avoid (black hat)

Google comes down hard on manipulative link building. Buying links at scale can trigger a manual penalty with a traffic drop of 50 to 90%. Large scale reciprocal link exchanges are detected and devalued. PBNs (Private Blog Networks) are risky because Google keeps improving its detection. Low quality directories and spam blog comments add no value at all and can do real damage.

Building a link strategy that lasts

A sound link building strategy aims for 5 to 20 quality backlinks a month depending on how competitive your market is. Diversity is essential: vary the types of site (blogs, media, trade directories, forums), the types of link (dofollow, nofollow, plain mention), and the anchor texts (brand, URL, descriptive text).

Link building is a marathon, not a sprint. The results compound: every backlink strengthens the overall authority of your domain, which benefits all of your pages. A solid backlink profile can take 6 to 12 months to build, but it protects your rankings for years.

Anchor text: the most misunderstood detail

The anchor text is the clickable text that carries the link. It sends Google a strong signal about the subject of the target page, but too many optimised anchors (always "cheap plumber Lyon") raise suspicions of manipulation. A natural profile mixes them up: brand anchors (ConvertiLab), URL anchors (convertilab.com), generic anchors (click here, find out more), and only a minority of exact match anchors carrying the keyword.

A healthy split looks like 40% brand, 20% URL, 25% generic and 15% keyword anchors. For a small business that means not dictating one rigid anchor to your partners, but letting variety settle in naturally as the mentions accumulate.

Local link building for tradespeople and local shops

A small business does not need links from Le Monde to dominate its catchment area. Local link building is more accessible and often more profitable: listings in serious trade directories (Pages Jaunes, chambres de métiers, sector federations), partnerships with complementary non competing businesses (a caterer swapping links with a venue hire company), sponsoring a sports club or a local event with a link from their site, and articles in the regional press.

A worked example: a roofer earns 6 local links in 3 months (2 trade directories, 2 fellow trade partners, 1 club sponsorship, 1 local press piece). His domain authority goes from 8 to 17, and he climbs from page 2 to the top 3 for "roofer" plus the name of his town, a query with strong commercial intent.

Link building checklist for a small business

- Start by creating content worth citing (a guide, a local study, a tool). - Claim your listings in the relevant trade and local directories. - Set up 2 to 3 partnerships a quarter with complementary businesses. - Watch for broken links on sites in your sector so you can replace them. - Track how your link profile evolves with a tool such as Ahrefs or Moz. - Run from any supplier promising "500 backlinks for 50 euros".

Best practice in 2026

In 2026, quality matters more than ever over quantity. Search engines weigh contextual relevance and the trustworthiness of the source before the sheer number of links. One editorial backlink earned through genuine expertise is worth a hundred manufactured ones. For small businesses the durable path is unchanged: produce useful content, become visible locally, and build real relationships.

At ConvertiLab we build link building into our SEO strategies with backlinks earned through guest articles, media partnerships and linkable content, always favouring high value local links for our tradespeople and freelance clients.