Summary
Think of having a courteous servant ready to obey your voice commands at all times, and that's what Siri can do for you and your iPhone. Not everyone may need Siri to play music, but chances are good that you use your iPhone for common tasks that can be made easier by relying on Siri.
Practice using different words and phrases to see which ones work most accurately with Siri. Depending on your pronunciation, some words and phrases may work better than others. Siri is handy when you can't use your hands to manually control your iPhone.
While Siri can control most features of your iPhone, the one feature that requires your complete attention is taking pictures through the iPhone's camera, which is the subject of the next chapter.