SVK, once installed, has a number of different pieces. The following is a quick overview of what you get. Don't be alarmed if the brief descriptions leave you scratching your head—there are plenty more pages in this book devoted to alleviating that confusion.
The command-line client program.
A tool for creating, tweaking or repairing a Subversion repository—this is technically part of subversion, however svk need it to be installed in order to create depots..
Assuming you have SVK installed correctly, you should be ready to start. The next two chapters will walk you through the use of svk, SVK's command-line client program.