FTDNA Information Pages

Family Tree DNA has some excellent information pages. 

Here are links to some pages that will help you understand and get the most from DNA testing at FTDNA.
 
About FTDNA
Family Tree DNA Database numbers:  http://www.familytreedna.com/why-FTDNA.aspx

DNA Tests
Haplogroups
 
myFTDNA Personal Page
 
Ancestry
 
Project Administration
Responsibilities of Group Administrators: http://gap.familytreedna.com/gap-guidelines.aspx