A misinterpretation might isolate this verse to imply the gospel was exclusively a Jewish affair limited to Judea and Galilee, ignoring the broader context of Peter's sermon to Gentiles demonstrating God's impartiality and the message's worldwide reach; another error views 'that word' as merely John's baptismal call to repentance without connecting it to Jesus' subsequent works, suffering, resurrection, and commission to preach forgiveness to all nations.
Acts 10:37
King James Version (1769)
37 That word, I say, ye know, which was published throughout all Judea, and began from Galilee, after the baptism which John preached;
This verse captures Peter affirming to Cornelius and his Gentile household their familiarity with the gospel message that originated in Galilee following John the Baptist's preaching and spread throughout Judea, establishing the historical foundation of Jesus' ministry as publicly known and verifiable, which Peter uses to bridge into proclaiming Christ's death, resurrection, and universal salvation available to all who believe.