How do you sync apps to iPod Touch?

[Suteisi]

What the title says.

I bought the Bejeweled 2 apps from the iTunes store and I can't figure out how to put it on my iPod touch. When I looked for help or guidelines online, all I get is "it will sync automatically once you plug your iPod to your computer". Which it isn't, because I can't find it anywhere when I turn my iPod touch on.

Or maybe I'm blind? Shouldn't there be an "Apps" icon or is it hidden somewhere?

Thanks in advance~