Hello Manoj
There are lot of documents on MDG. You can start with following and explore the rest on SCN and on sap help site.
This is the main page where you have link for all the MDG related stuff and all the module details / config documents etc.
Enjoy....happy reading.
SAP Master Data Governance - SAP Master Data Management - SCN Wiki
Configuration documents -
http://help.sap.com/erp_mdg_addon61/helpdata/en/56/071a748f67482f83eca92b965f89f3/frameset.htm
Kiran