Item ID is the number to the left of the item's name in the database.
You store the item in a variable by setting that variable equal to the Item's ID number, and you can give the party that item by selecting the variable instead of a specific item in the Item Management command.
"Game development is a very special job that requires a very special person. The high stress levels often drive our staff members to become...subhuman. They're violent and need to be caged. But we need them to make good games. This is the unfortunate truth of the game industry." - Segagaga