The pack addresses security, stability, and performance and provides better compatibility with Windows 8, Internet Explorer 10, Office 2013, and SharePoint 2013.
In addition to the new functionality Service Pack 2 provides, as with all Service Packs, it includes a number of fixes designed to improve your experience with SharePoint 2010 and includes all Cumulative Updates through April 2013 and Public Updates through May 2013.
More information: