By default your iPhone will be backed up wirelessly to iCloud using iCloud Backup. Most iPhone users probably don’t even know they have this turned on, but it will save them if they lose their iPhone. You can see how much space your iPhone backups are using and customize your backup. You can remove data from apps that you don’t really need to be backed up.
EVERYONE should watch this brief MacMost video and also tell their fellow Apple users to do so!!