What does sync do between iPad and iPhone?

I have an ipad currently, and I'm looking at getting a new phone. How does the sync feature work and what does it do? Is it worth me getting an iphone for that reason or shout i get an S3?

Syncing is the process of ensuring that computer files in two or more locations are updated via certain rules. To sync, make sure you have the latest version of iTunes. Then, connect the iPad, iPhone, or iPod Touch to your computer. It will automatically sync. I'd say you get the Samsung Galaxy S3 instead of the iPhone. The S3 is more faster and has a bigger screen.