Doubt In SAP@Web Studio

Hi All

I just started to study ITS. i would like to know whether i must have the knowledge in SAP@Web Studio?. if yes please help me to start SAP@Web Studio. how do i start to learn SAP@Web Studio?. if you have any Tutorial for this kindly send me to this mail id saran_dg@rediffmail.com.

i have one more doubt. we have ITS to display our R/3 Transaction as a Web transaction, then why we need SAP@Web Studio?.answer will be rewaded.

Regards

Saravanan