Ok.
I have an iPhone 5c with the software up to date.
I have deleted most of my photos and some apps off the phone handset. I pluged it in to our Mac to add some music.
The coloured summary bar of the phone on iTunes on the Mac is still showing the photos and apps as being on the phone, despite the fact my handset no longer has them on. There is also 1.16GB of Documents and Data and 642.4MB of Other showing on the bar which I would like to remove.
I hope that makes more sense.