The ‘Server’ dimension typically lists the hostname of the site. For report suites that combine multiple domains or subdomains, this dimension is valuable to see which domains or subdomains perform the best.
Dimension items include servers on your site. Your organization determines what specific dimension items you want to use. Some organizations use
window.location.hostname, while others formulate a custom values. Whatever method you use, make sure it is consistent and that you record it in a solution design document.