The document discusses expressions of politeness such as "excuse me" and "please". It provides examples of when to use "excuse me", including to get someone's attention, to indicate you are leaving, or to apologize for a small mistake. It also gives examples of when to use "please", such as when asking for something, accepting an offer, requesting someone do something, or requesting information. The example dialogue demonstrates using "excuse me" to get the assistant's attention and "please" when requesting information about a sweater.