I don't understand the difference between iPhone's sync and backup and where the backup is stored?

[iMore Question]

Difference between sync and backup

 

[iOS Gravity]

Back up is when save the data from your device onto another one, or the cloud.
Sync is when data is transferred from one device to another.

 

[Just_Me_D]

Difference between sync and backup

In addition to what iOS Gravity stated, a backup is saving the current state/setup of your device and allows for the device to be restored to that state/setup in the future, if necessary. Syncing allows for data to be kept current on all of your compatible devices.

 

[melmurphy]

Me being a tech dummy I guess this is why it was suggested on here that I open an ITunes account on my windows pc.
I could just connect iPhone to pc and pictures would load (sync) onto my pc but with ITunes account I now have a place to backup current state/setup as you say of phone and save it just in case. Pictures included.