Even if you do get the Permanent Resident card (aka green card), following your successful application, be aware that if your marriage is less than 2 years old, you are still under the Conditional Status.

This conditional status can be cancelled after 24 months if your American sponsor (your spouse) applies for it. You must apply within 90 days before the 2nd anniversary of the issuance of your visa. (Not the Resident Card, but the visa: the issue date is stamped on your passport). This costs $205 (at time of writing).

If you spouse does not apply for the conditional status to be cancelled, you will not have any right to stay in the USA and will not be considered as a legal alien anymore. (Yes - you need to apply and pay $205 for a cancellation.)