Let's imagine that we have a regular web application persisting information in a database. This web application is deployed in server A, and the database is deployed in server B. Common sense leads us to realize that the latency won't be the same, whether both servers are located in the same or different data centers. Another consideration is, of course, where the end users are located. Today, the cloud offers the chance to choose where you want to deploy your components, depending on your needs, which is helpful when it comes to providing a better user experience.