RankCentral is a tool for tracing a domain's Page Rank. Page Rank is the method Google uses to decide a sites importance. Page Rank does, among other things, decide where a site is placed in a search result.
By using RankCentral you can trace thousands of domains quickly. This way you can keep track of Google's ranking of your sites. This makes RankCentral a great tool for developers and anyone who owns a domain.