The twenty-four elders in Revelation 4:4 are human, male believers who sit on thrones before the Lord, wearing white garments, which symbolize righteousness. They are distinct from angels and are described as wearing crowns, a privilege granted to believers. While the Bible doesn't explicitly identify them, they are often interpreted as representing either the church, Israel, or a combination of the twelve patriarchs and twelve apostles. One view ties the number twenty-four to the twenty-four priestly groups from 1 Chronicles 24:1–5, possibly symbolizing the "kingdom of priests," who will worship God in heaven during the tribulation. The twenty-four elders serve as a picture of God's people, worshiping Him after being raptured and escaping the tribulation.
The twenty-four elders represent those who worship the Lord. More specifically, they may represent 1) the church, 2) representatives of Israel, or 3) the twelve patriarchs and twelve apostles (Matthew 19:28). One variation of these views is that the use of twenty-four elders may come from 1 Chronicles 24:1–5, in which the priests were organized into twenty-four groups. If so, this "kingdom of priests" represents the church that dwells in heaven with the Lord during the tribulation period.
This would also help alleviate the concern of Israel being represented in heaven during the tribulation period when Israel had not yet believed in the Lord Jesus on a large scale. Further, it would remove the problem of these elders representing the apostles since John himself, an apostle, was the one having the vision (Would he have seen himself as one of the twenty-four elders and not mentioned it?).
Again, while not specifically explained, the information in Scripture most likely identifies these twenty-four elders as representatives of the church, those who will dwell with the Lord during the tribulation period while God's judgments take place on the earth. Further, this fits the historic view of elders representing leadership of local churches (1 Timothy 3:1–7; Titus 1:5–9), offering a picture of God's people worshiping Him after escaping the tribulation as a result of the rapture (John 14:1–3; 1 Thessalonians 4:13–18; 1 Corinthians 15:51–58).