The network capacity of a server determines how quickly your sites shall open and how many people will be able to visit them simultaneously. Of course, that isn't the only factor, but it's a really important one. On one hand, irrespective of how optimized a certain site could be, bad connectivity would mean slower loading speeds or possibly service interruptions, especially if only one Internet provider is used to access the hosting server. Alternatively, a fantastic connection with lower capacity will permit only a small number of visitors to explore the site all at once, while new visitors shall have difficult experience loading any content. In this sense, the success of your site relies upon not only on the content, but also on the site’s accessibility and loading speed. These factors are dependant on the connection that the hosting server uses.