What does syncing my iPhone mean?

I downloaded music from somebody's computer with there I tunes, does that mean they synced my phone to there computer? & if so does that mean they can see my photos/videos/voice memos?

Your phone can be only synced to one computer… When you get home and sync it, it will delete all your songs you got at your friends… I recommend having your friend email u the songs and transferring them to your iTunes library than sync it

  • What EXACTLY does Syncing do? If I sync my iPhone to iTunes on my laptop, what will happen? Will things get erased, will I still have everything the same, I need to know! Please try to explain it to me as simple as possible. As soon as possible
  • What does this mean: Free Msg: Receiver unable to receive message - Message Blocking is active mean on iPhone's iMessage? I tried sending my friend a text and it replied with this. We haven't gotten into any fights and we hung out for hours recently. Has she blocked me?
  • What does syncing my iPhone mean? - 1 I have a 13 inch Macbook Air and an iPhone 5S with updated software. I want to put a ringtone onto my phone. I already have it set up, but when I want to put it onto my phone, it wants me to "sync" it. It says that it's going to clear the iTunes library on my phone, which has music my Macbook doesn't have. People online say that it's just going to add the songs from my Macbook, and not replace the ones on my phone. Which is right?
  • What does Other mean when syncing an iphone? When syncing my iPhone I notice that the a large part of my space is taken up by a block called other. What is this made up of and How can try to make is take up less space?