What did abel know that was important to god?

Abel understood the importance of offering God his best, as demonstrated by his choice to present the firstborn of his flock as a sacrifice. This act of faith and devotion highlighted his recognition of God's sovereignty and his willingness to honor Him with a sincere and quality offering. In contrast to Cain's offering, Abel's sacrifice exemplified true worship, which was significant to God. Abel's heart and intention behind his offering reflected a deeper relationship with God, emphasizing the value of faith and obedience.