Availability refers to the state of being accessible or ready for use. In various contexts, it can mean the presence of a resource, such as a product in a store or a service that can be utilized. For example, when a customer checks the inventory of a store, they are looking for the availability of specific items. In technology, availability often relates to systems and networks being operational and ready to serve users. High availability is crucial for businesses, ensuring that their websites and applications remain functional and accessible, minimizing downtime and enhancing user experience.