Wiki

A wiki is a website whose pages can be created and edited collaboratively by its users, with the pages interlinked into a connected body of knowledge. The defining feature is open, collaborative editing: rather than one author publishing finished content, many contributors create, revise, correct, and extend the same pages over time, so the content is a shared, evolving work. Wikis usually keep a revision history (so changes can be tracked and reverted) and make it easy to link pages together and create new ones. The best-known example by far is Wikipedia, the collaboratively edited online encyclopedia, but the model is used widely beyond it — for internal company documentation, product knowledge bases, project documentation, and community reference sites. The word itself comes from the Hawaiian wiki, meaning quick, reflecting how easily pages can be created and edited.

A wiki matters because it is a powerful model for building and maintaining a body of knowledge collaboratively. Because many people can contribute and edit, a wiki can grow large, stay current, and self-correct as contributors fix and improve one another's work, aiming at a settled, reference-quality version of each topic. For businesses, the wiki model underlies internal documentation (where a team maintains shared knowledge that does not depend on one person) and customer-facing knowledge bases (where support and how-to content is collaboratively built and kept up to date). The same collaborative-editing strength is also a vulnerability — open editing can introduce errors or vandalism — which is why wikis rely on revision history, moderation, and community norms to maintain quality. Used well, a wiki turns scattered knowledge into a maintained, linked, shared reference.

A wiki is best distinguished from the forum and the blog it is often grouped with. A wiki is a collaborative knowledge format: many users edit a shared set of pages, converging on a single, settled, reference-quality version of each topic. A forum is a discussion format: many users post threads and replies, and the value is the ongoing conversation and the many viewpoints it preserves, not a single consolidated answer. So a wiki aims at consensus knowledge — one best version, collaboratively edited — while a forum aims at discussion — many posts, many voices, preserved over time. One consolidates; the other converses. A question answered on a wiki becomes a maintained reference page; the same question on a forum becomes a thread of replies.

A blog is different again: it is a one-to-many publishing format where typically one author or organization publishes posts and readers may comment, so the core content comes from the publisher rather than collaborative editing. The three sort by who creates content and how. A blog is one author broadcasting; a forum is many users discussing among themselves; a wiki is many users collaboratively editing a shared reference toward one settled version. A business might use a blog to publish its own thought leadership, a forum to host community discussion, and a wiki or knowledge base to maintain documentation. The mistakes come from mismatch — expecting a wiki to capture lively debate (it consolidates rather than preserves disagreement) or a forum to serve as authoritative reference (it preserves discussion, not a settled answer).

Using a wiki well means deciding what it is for — internal documentation, a customer knowledge base, a community reference — and structuring it so pages are well-linked, findable, and organized, since a wiki's value grows with how easily knowledge can be navigated and connected. It means setting editing permissions and moderation appropriate to the audience (open community editing needs more oversight than an internal team wiki), using revision history to track and revert changes, and assigning ownership so pages are kept current rather than rotting. It means encouraging contribution while maintaining quality and accuracy, since the collaborative model is only as good as the care contributors and moderators put in. Done this way, a wiki becomes a living, maintained, shared reference rather than a stale or chaotic page dump.

The failures are letting a wiki sprawl without structure or ownership (so it becomes an unnavigable, outdated mess), under-moderating open editing (so errors and vandalism creep in), over-restricting editing so the collaborative advantage is lost, and confusing the wiki's role with a forum's or a blog's. Another trap is treating a wiki as set-and-forget — collaborative content rots without active maintenance and contribution. The discipline is to give the wiki a clear purpose, structure and link its pages, set the right balance of openness and moderation for the audience, use revision history to maintain quality, and keep ownership so the shared reference stays current and trustworthy — distinct from a forum's discussion role and a blog's broadcast role.

A wiki — a collaboratively edited website of interlinked pages aimed at a settled reference, exemplified by Wikipedia — is the model behind knowledge bases and documentation, distinct from a forum and a blog.

Etymology: source.

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