God's grace is in Jesus Christ our Lord. God's grace changes our hearts, which is regeneration. God's grace enables us to repent and believe the gospel of Christ, which is our conversion (Philippians 1:29; 2 Timothy 2:25).
God's grace is salvation by faith in Christ (Ephesians 2:8-9). Salvation is God's grace working through us in Christ (Ephesians 2:10). The Bible clearly teaches that salvation is by God's grace, and not by any works which we have done. "Not by works of righteousness which we have done, but according to His mercy He saved us, through the washing of regeneration and renewing of the Holy Spirit" (Titus 3:5).
God's grace is the gift of God in Christ. It is never earned by our works. If salvation was by our works, we could boast of what we have done. However, salvation is by grace in Christ alone, which means it is the gift of God. Salvation is the finished work of our Lord Jesus Christ. Salvation is to the glory of God alone, as Father, Son and Holy Spirit.
Salvation is not received by God's grace plus our works. Some teach that salvation is initiated by God's grace and must be completed by our works. Not so. When grace saves us, it is by grace received in Christ. God's grace in Christ begins and completes our salvation (Philippians 1:6).