Question: "What is the Judgment Seat of Christ / Bema Seat of Christ?”
Answer: A believer's deeds are judged at the Judgment Seat of Christ (Romans 14:10-12). This judgment does not determine salvation, but rather is when believers must give an account of their lives to Christ. We should not look at the Judgment Seat of Christ as God judging our sins, but rather as God rewarding us for our lives. Yes, we will have to give an account of our lives. Part of this is surely answering for the sins we committed. However, I do not think that is going to be the focus of the Judgment Seat of Christ.
At the Judgment Seat of Christ, believers are rewarded based on how faithfully they served Christ (1 Corinthians 9:4-27; 2 Timothy 2:5). The things we will likely be judged on is how well we obeyed the Great Commission (Matt 28:18-20), how victorious we were over sin (Romans 6:1-4), how well we controlled our tongue (James 3:1-9), etc. The Bible speaks of believers receiving crowns for different things based on how faithfully they served Christ (1Corinthians 9:4-27; 2Timothy 2:5). The various crowns are described in 2 Timothy 2:5; 2 Timothy 4:8; James 1:12; 1 Peter 5:4; Revelation 2:10.