My understanding is that Baptists and Jehovah’s Witnesses reject infant baptism and advocate full water immersion of adults who fully understand what they are doing and what baptism means.
Believer's baptism (occasionally called credobaptism, from the Latin word credo meaning "I believe") is the Christian practise of baptism as is understood by many evangelical denominations, particularly those that descend from the Anabaptist and English Baptist tradition. According to their understanding, a person is baptized on the basis of his or her profession of faith in Jesus Christ and as admission into a local community of faith. Source: https://en.wikipedia.org/wiki/Believer%27s_baptism
The Baptist Union of Great Britain says this in their Declaration of Principle:
Christian Baptism is the immersion in water into the Name of the Father, the Son, and the Holy Spirit, of those who have professed repentance towards God and faith in our Lord Jesus Christ who 'died for our sins according to the Scriptures; was buried, and rose again the third day'. Source: https://www.baptist.org.uk/Groups/220595/Declaration_of_Principle.aspx
Do Baptists believe adult water baptism is essential to salvation? If not, why not? This question is not about “right or wrong” but is seeking clarification on how Baptists view baptism in relation to salvation.