Availability management ensures services are delivered at agreed-upon levels of availability to meet the needs of customers and users. When talking about availability, it is talking about the ability of an IT service or other configuration item to perform its agreed-upon function when it's required. For example, if you want to go to the Dion Training website to read the articles on ITIL 4, you want to make sure you type in itil.diontraining.com. The website comes up and, here you are reading one of the articles. But that simply means that it's available. Dion Training aims to have 99.999% availability, which means that their website is up at least the entire year minus five minutes. That is a pretty big ask. And to do that, they use load balancers, multiple redundant servers, and all sorts of cloud infrastructure to make sure their server is up and running any time you're trying to get to it. That's what Dion Training is trying to do with availability, and availability management ensures that indeed, that happens.