Not knowing what they actually gave you, I can't say how well it works. But a fully cycled tank will read 0 ammonia and 0 nitrites ideally. Nitrates no more than 20 (this is what is removed with weekly water changes).
Of course your tank can go into a mini cycle too. Meaning, that even after your tank is cycled, if the ammonia input increases (ie feeding more than usual creating more food waste, or adding fish creating more fecal waste) and more bacteria needs to establish to deal with the increased amonnia levels.
Hope this helps, I know that water testing confused the heck out of me when I started. I'm still pretty new, so hopefully someone else can back up my statements (or tell me I'm wrong XP)