Suze Orman Why Does Suze Orman Say To Put Your 401k Rollover From Previous Employer In Traditional IRA?

Why does Suze Orman say to put your 401k rollover from previous employer in traditional IRA? - suze orman

Suze Orman advises that people of your previous 401k rollover traditional IRA to be used. He said that in 2010, to move money from traditional IRA to a Roth IRA.

Several questions:
1. What is a "traditional" IRA?
2. What is the logic and benefits of moving to a Roth IRA in 2010?
3. Will not be taxed if a Roth IRA is moving? If not, why not?