Into all the region
Around the Jordan River.
He was proclaiming
For the forgiveness
καὶ ἦλθεν εἰς πᾶσαν τὴν περίχωρον τοῦ Ἰορδάνου κηρύσσων βάπτισμα μετανοίας εἰς ἄφεσιν ἁμαρτιῶν,
This section of Luke is very similar to all the other 4 gospel stories. Luke explicitly said that John went into all the region around the Jordan River (καὶ ἦλθεν εἰς πᾶσαν τὴν περίχωρον τοῦ Ἰορδάνου). Mark, chapter 1:4, had the simple statement that John the Baptizer, appeared in the wilderness or desert, without mentioning the Jordan River. However, Luke was actually closer to Mark, since he used the exact same words about John’s preaching. He indicated that John was proclaiming a baptism of repentance for the forgiveness of sins (κηρύσσων βάπτισμα μετανοίας εἰς ἄφεσιν ἁμαρτιῶν). Matthew, chapter 3:2, said that the preaching message of John was very simple. They should repent, turn their lives around, with a profound metanoia, a change of their spirit. The equivalent about repentance, metanoia, or the change of heart can also be found in both Mark and Luke. Matthew had John say that the kingdom of heaven was at hand, coming near. The other canonical gospel writers did not use this term “kingdom of heaven.” John, chapter l:19-29, had a long dialogue with John and the priests and Levites about what he was doing. How and what John did before or after this preaching in the wilderness did not matter. He was there proclaiming a baptism of repentance, a life change, or a metanoia, to have sins or faults forgiven or wiped away.