I am new to cooking and often I see on Italian recipes call for dry red wine or dry white wine.
For a starter:
1) What are purpose of adding dry wine?
2) What are alternative to dry wines??
3) How to tell what red/white wines are dry?
4) Due to budget reason, what I can get to get small or similar result? And if dry wine is a must, but I just want to get one instead both of them, which one I should go for it?