What is the relationship between accessibility and usability?

The relationship between accessibility and usability is best described by the notion that accessibility removes barriers while usability enhances interaction. This means that accessibility ensures that products, services, or environments are available to all individuals, including those with disabilities. It aims to eliminate obstacles that might prevent someone from accessing content or using a service.

On the other hand, usability refers to how easy and efficient it is for users to interact with a product or service. While accessibility addresses whether a user can access a resource, usability focuses on how effectively and enjoyably a user can navigate that resource once it is accessible. Therefore, both concepts are interrelated but distinct, with accessibility laying the groundwork for usability.

This understanding is crucial because it highlights that merely making something accessible does not guarantee a good user experience. A solution that is both accessible and usable will provide a more satisfactory experience for all users.