WSU guarantee questions

I got accepted to WSU in November, and I just finished my financial aid. It just got sent back to me, and it says I guarantee for the Wayne State guarantee. So does this mean I’m not going to pay for tuition? I’m going to commute, and I would really like some more help with this because I am a little confused. Would anyone else who has the WSU guarantee be willing to tell me more information and share their experience with it?