What does the website drop-down box do?

In some cases, you might see a site drop-down box near the top-right corner of the Seller Central website. This drop-down box, which appears only if you manage multiple sites or marketplaces with Amazon, helps you switch between related websites. For example, if you sell on both the Amazon.com website and the Amazon.ca website, then you can use the Account Selector drop-down box to choose between viewing your orders on each of these sites.