"Christ has redeemed us from the curse of the law, having become a curse for us (for it is written, 'Cursed is everyone who hangs upon a tree'), that the blessing of Abraham might come upon the Gentiles in Christ Jesus, that we might receive the promise of the Spirit through faith" (Galatians 3:13-14).
Redeemed means to pay a price to set someone free. That's what Christ did at the cross for every believer. He paid the price to set you free from the curse of sin and death. If you are redeemed from the curse of sin, you believe on the Lord Jesus Christ (Acts 16:30-31). Believers are the redeemed
Jesus died "that the blessing of Abraham might come upon the Gentiles." Jesus fulfilled the covenant God made with Abraham to be a blessing to all nations (Genesis 12:1-3). God blessed Abraham in all things (Genesis 24:1). You are blessed in all things through faith in Christ (Ephesians 1:3). The redeemed are blessed in the Lord Jesus Christ.
Those who reject the gospel of Christ are under the curse because of sin. The word "cursed" means "cut off and marked for destruction." The words blessed and cursed are covenant terms. According to the covenant of law, sin brings the curse (James 2:10). According to the covenant of grace, the redeemed are blessed in Christ (Ephesians 1:3). You are redeemed by faith in Christ alone.