A **wikilink** is an internal [[Hyperlink|hyperlink]] used within [[Wiki|wiki]] platforms and related [[Knowledge management|knowledge management]] applications to create navigable connections between pages or notes within the same system. Created using double square bracket syntax (`[[Page name]]`), wikilinks allow authors to reference other content within a wiki without constructing full [[URL|URLs]], with the platform automatically resolving the link to the appropriate destination page. The convention originated with [[Wikipedia]] and the [[MediaWiki]] software that powers it, and has since been adopted widely across personal knowledge management tools, [[Note-taking software|note-taking applications]], and collaborative documentation platforms. In [[MediaWiki]], wikilinks support a pipe character modifier that separates the link target from the display text, written as `[[Target page|display text]]`, allowing authors to embed links in grammatically natural prose without requiring the link text to match the title of the destination page exactly. MediaWiki additionally supports **redirect pages**, which forward wikilinks pointing to alternate titles or synonyms to a canonical destination, and **anchor links** that target specific sections within a page using the `[[Page name#Section]]` syntax. Wikilinks that point to pages that do not yet exist are rendered as red links in MediaWiki, visually distinguishing missing content and serving as an authoring signal to encourage the creation of referenced but absent articles—a feature that has contributed significantly to Wikipedia's collaborative growth dynamic. Beyond MediaWiki, the wikilink convention has been adopted by a range of personal and collaborative knowledge management tools, including [[Obsidian (software)|Obsidian]], [[Roam Research|Roam Research]], [[Logseq]], and [[Notion]], which use it as a core mechanism for building interconnected note networks. In these contexts, wikilinks underpin the concept of **[[Bidirectional link|bidirectional linking]]**, in which the linked-to page maintains an automatically generated list of **backlinks**—all pages that link to it—enabling authors to navigate the network of relationships from either direction. This bidirectional linking model is central to [[Personal knowledge management|personal knowledge management]] methodologies including the [[Zettelkasten|Zettelkasten]] method, where dense interlinking of atomic notes is used to surface emergent conceptual relationships across a [[Digital garden|digital garden]] or knowledge base.