Catching up?

uhh its quick and simple i give questions, you give answers thanks in advance
1. where can i locate my save file
2. wat war paste codes?
3. save editors?
4. " Borderlands 2 Save Editor Revision 147/146 + ID List" whats that?

1. Documents\My Games\Borderlands 2\WillowGame\SaveData\Big number here
2. Codes to create/give your characters items in the save editor, each variation of an item having its own code.
3. The one in the thread you mentioned, should be at revision 153 now.
4. The thread with the latest version of the save editor.