For Christians, our faithfulness in this world influences our rewards in the world to come. This is not the final judgement. At the final judgement, if we are Christians we are saved and guaranteed a place in heaven. Our sin have been forgiven in Christ and we are righteous in God’s sight. On the other hand, if we have ignored or rejected Christ, we will be judged by God and spend an eternity apart from God in what Jesus described as the cosmic rubbish dump (“gehenna”).
The Bible teaches that as Christians we face an assessment where our work for the Lord will be tested and we will be rewarded (or not) according to our faithfulness. This is not the final judgment as our entrance into the New Creation is secure, but an accounting to God of what he has entrusted to us.