Backlinks
TL;DR
Hyperlinks from one website pointing to another, acting as votes of authority that signal trust and relevance to search engines.
Backlinks are hyperlinks on external websites that point to your site. They remain one of the strongest ranking signals in Google's algorithm — a concept rooted in the original PageRank principle that a page linked to by many authoritative pages must itself be authoritative.
Not all backlinks are equal. A single link from a high-DA, topically relevant publication (e.g., Forbes covering your case study) is worth far more than hundreds of links from low-quality or irrelevant directories. Search engines evaluate backlink quality based on the authority, relevance, and anchor text of the linking page.
Link building — the practice of earning or acquiring backlinks — is a core SEO activity. Legitimate strategies include: guest posting on reputable publications, creating linkable assets (original research, tools, infographics), digital PR campaigns, broken link building, and building relationships with journalists and bloggers. Guest posting platforms like eWorld Technologies connect quality writers with publishers to earn authoritative, editorial backlinks.
Examples in Practice
A backlink from the BBC, TechCrunch, or Forbes would significantly boost a site's authority. A backlink from a low-quality link farm would be harmful.