This passage is a list of behaviors that Paul considers to be "of the flesh," and therefore incompatible with living in accordance with the Spirit. These behaviors are seen as evidence of a person being controlled by their sinful nature, rather than by the Holy Spirit.
The list includes a variety of sins and immoral acts, including sexual immorality, idolatry, hatred, and drunkenness. Paul is warning the Galatian Christians (and by extension, all Christians) that engaging in such behaviors will prevent them from inheriting the kingdom of God.
It is worth noting that Paul is not simply listing off behaviors that are prohibited by God, but is emphasizing the importance of living a life that is transformed by the Spirit. The list of behaviors here serves as a reminder of the stark contrast between the works of the flesh and the fruit of the Spirit (Galatians 5:22-23).
In essence, these verses are a call to holiness and obedience for all who claim to follow Jesus. It reminds us that our lives should be characterized by the fruit of the Spirit, rather than by the works of the flesh. It serves as a powerful reminder of the importance of living in accordance with the will of God, and avoiding behaviors that are inconsistent with his character.
See also: vs. 18-23
Galatians 5:19-21. Now the deeds of the flesh are obvious, which are: adultery, sexual immorality, uncleanness, lustfulness, idolatry, sorcery, hatred, strife, jealousies, outbursts of anger, rivalries, divisions, heresies, envy, murders, drunkenness, orgies, and things like these; of which I forewarn you, even as I also forewarned you, that those who practice such things will not inherit God’s Kingdom.