Answer:
The term "girl on girl" generally refers to 2 girls making out together.
And as to technique, each girl does to the other much the same as a boy would, with one minor difference - no penetrative sex. Girls do understand a bit more about what makes a girl happy so tend to be bit, not a lot, better at it than boys. Also, they take it slowly - slowly is what most girls want.
Not entirly true m,e and my girlfriend started off totaly hard just screwing eachothe all night we still do and we video tape it as well