In baptism, you telling the world what God has done for you.
If the question is concerning water baptism, the answer is no. We are not saved by ritual or works but by “grace through faith.” “For it is by grace you have been saved, through faith – and this not from yourselves, it is the gift of God – not by works, so that no one can boast” (Ephesians 2:8-9). Therefore, water baptism does not save us. However, the baptism of the Spirit is necessary for salvation and that has nothing whatever to do with water and it is not something we do for ourselves, it is God’s gift to us at the moment we are born again.
No. Salvation does not rely on what we can do but on what Christ has done. Yes, baptism allows us to make a statement that we have made a 180 degree turn on sin and now facing a life with God.