An appeal is a proceeding in a higher court (the Illinois Appellate or Supreme Court), taken because you believe the trial court erred in deciding your case. Appeals are costly, and should only be taken when you believe you have a high likelihood of success. If you lose your appeal, you may be ordered to pay the fees and costs of the prevailing party.
As a general rule appeals can only be taken from a final judgment resolving all of the disputed issues. There are certain exceptions such as an early appeal from an injunction, or from temporary custody orders.
David has successfully appealed multiple cases, and argued before Appellate Court panels. He will advise you as to whether it is wise to appeal, what issue(s) to appeal, and your chances of winning on appeal.