What does "No, it usually isn’t. You should add a tip." mean in English for Spanish?

In English for Spanish, "No, it usually isn’t. You should add a tip." means:

No, normalmente no lo está. Deberías añadir una propina.

Listen to "No, it usually isn’t. You should add a tip.": (If you have an HTML5 enabled browser, you can listen to the native audio below)