Building an alter
Abraham built an altar as Noah did when he left Haran in Genesis 12. The place of the altar refers to performing the consecration and worshipping God.
Also, it is an indicator to look at your spiritual state and your relationship with God because the altar of God fell when Israelites disobeyed God’s will or worshiped idols.
Therefore, I am sure building an altar was Abraham’s concrete act of faith in God. So likewise, building an altar in your area of life will keep you spiritually healthy and close to God if you are a follower of Christ, the Messiah, the son of God.