Link building is a key discipline within the field of search engine optimisation (SEO). It refers to the strategic process of acquiring hyperlinks – known as backlinks – from external websites to one’s own website. The main aim is to improve a website’s visibility and ranking in search engine results. Search engines such as Google interpret backlinks as recommendations or signs of trust from other websites. The more high-quality and thematically relevant backlinks a page has, the more likely it is to be classified by search engines as authoritative and trustworthy, which has a positive effect on its ranking in the SERPs (Search Engine Results Pages).
The quality of a backlink is more important than sheer quantity. A single, thematically relevant link from a highly authoritative website is far more valuable than numerous links from irrelevant or low-quality sites. Effective link building not only helps to improve rankings, but can also generate direct referral traffic and increase brand awareness.
Link-building strategies
Acquiring high-quality backlinks requires a variety of strategies, many of which are time-consuming. Reputable link building avoids manipulative practices, which can be penalised by search engines, and focuses on organic methods:
- Content marketing: The creation of outstanding, informative and unique content that is inherently link-worthy (link bait). This includes studies, infographics, comprehensive guides and tools.
- Guest posts: Writing articles for thematically relevant external blogs or news sites that contain one or more links to your own website.
- Broken link building: Identifying broken external links on other websites and offering your own relevant content as a replacement.
- Unlinked Mentions: Identifying mentions of one’s own brand, company or specific products and services that do not yet include a link, and requesting that a link be added at a later date.
- Directory listings: Listing your own website on relevant resource or industry directories, provided these offer genuine added value to users.
- Skyscraper technique: Identifying popular content with many links, creating even better and more up-to-date content on the same topic, and contacting the original link providers.
- Digital PR: Generating media interest and press releases that lead to coverage and, consequently, backlinks from news portals and magazines.
Quality criteria for backlinks
To derive the greatest possible SEO benefit from link-building measures, the following criteria are crucial when evaluating a backlink:
- Relevance: The link should come from a website that is thematically or industry-wise relevant to your own website. A high degree of thematic overlap signals a stronger connection to search engines.
- Authority of the linking domain: Links from websites with a high Domain Authority (DA) or Domain Rating (DR) – metrics that assess the strength of a domain – pass on more ‘link juice’ and are therefore more valuable.
- Naturalness of the link profile: A balanced and natural-looking link profile is essential. Search engines recognise and devalue link structures that appear manipulative, such as those resulting from the purchase of links.
- Anchor text: The anchor text – that is, the visible, clickable text of a link – should be relevant and, ideally, reflect the relevance of the linked content. It is advisable to use a variety of anchor texts rather than just a single keyword.
- Link placement: Links placed within the main content of a page are generally valued more highly than links in the footer, sidebar or comments section.
- ‘Dofollow’ vs ‘Nofollow’: ‘Dofollow’ links are required for the transfer of link juice. ‘Nofollow’ attributes instruct search engines not to follow the link and not to pass on any ranking value, although they can still be useful for referral traffic.
Successful link building is an ongoing process that requires strategic planning, high-quality content and the development of relationships with other website owners. It is a fundamental component of a successful long-term SEO strategy and contributes significantly to online visibility and business success.
