To ensure the best response to each user many of our customers spread the load of their site over multiple web servers. Should one of these web servers fail, or serve content that is different from the others, some users may receive an old page or perhaps none at all. Problems like this can be hard to diagnose from the inside. By providing a direct link to each server (ie www1.example.org and www2.example.org) Sitemorse tests their content and performance individually, especially important if your servers are located on different networks.