In Azure, your data, servers and data are by default located in data centres in the Netherlands. You can also specify whether you want to distribute your services to the rest of the world or to a specific location. Sometimes you want to be 'georedundant', i.e. operate in more than one geographical location at the same time. Perhaps you want the Hong Kong office to have a higher performance and you want to have servers or services in that specific region. You can indicate this.