The next date will expire. The owner usually renews every year its domain, but some prefer buying more than a year only. The registar is the authority where is registered. Domain age is a measure of how much a site is old. Older sites have normally more importance and are more trustworthy than young ones. The IP of a server identifies it. It can be unique or shared between multiple sites. Server location specifies where it is physically. The date was registered for the first time.