What does findability mean on a website?

Findability is the ease with which information on a website can be located, both by users navigating within the site and by search engines discovering it externally. Peter Morville defined it in 2005 as the ability of users to identify an appropriate website and navigate its pages to discover and retrieve relevant information resources. The core principle is direct: if users cannot find it, they cannot use it or buy it.

Findability encompasses the entire discovery process, including navigation, taxonomy, tagging, search functionality, and information architecture. It divides into two dimensions: external findability (how easily search engines and external channels surface the site) and on-site findability (how efficiently visitors locate specific content once they arrive). Findability relies on well-planned information architecture to guide users intuitively to their destination. Mark Baker framed the distinction clearly: findability is a content problem, not a search problem. Even when the right content exists, users often end up deep in the site but not in the right place. Perfect findability is unattainable, so the practical goal is reducing the effort required to locate information at every step.