What is R.A.M. , where is it and what does it do.

R.A.M. is a random access memory. It is a way of storing computer data. It is good because you can store more stuff on your computer, keeping it safe. R.A.M is accessible thought to be the computer's brain called the CPU which stands for central processing unit.

More R.A.M is better.

The more R.A.M you have the better because you can store more stuff which is good if you use a lot of memory and storage.
Pocketnow Power User: All About RAM (S02E02)