For example, If you where to put you're favorite songs on your Ipod, but then, accidentally delete them all off of your computer. So you sat there in a bad mood and it hit you, My Ipod still has all my music! I can just re-import in from my ipod! Thats when you would go into iTunes and see if you could drag them out of your Ipods library into your iTunes library, but no Apple didn't want to make it this easy for some obvious reasons.
But here is how you can do it Free without any software.
Step 1: First
Step 2: Secent
Step 3: Thirdly
Step 4: Fourthly
Step 5: Fifthly
Step 6: Sixthly
Step 7: Seventhly
After opening a folder you will see the odd names of songs, and hopefully the Artists as well. To tell what it is drag it some where and open it with iTunes. There it will give you the full name of the song, and the artist.
If you are here to import all the songs, Create a folder on the desktop and copy all of the sub folders into it. You then want to go to iTunes, go under "Files" then select "Add Folder to Library" and add, in my case, "F00," "F01," "F02" extra till you do all of the sub folders.
Quick suggestion; After you get the files into iTunes, I would suggest that you Consolidate your library. So you can move and or delete the music files and not worry about them no longer playing.