What does Exodus 8:2 mean?

Egypt's king, Pharaoh, is being given a chance to spare his country from further harm. He has refused to release Israel from slavery (Exodus 1:11–14; 5:1–4; 7:14). God has recently devastated the Egyptian kingdom by turning all its surface waters into blood (Exodus 7:20–23). The Nile's ruin may be the immediate cause of what happens next (Exodus 8:6), but God makes it clear that He alone is in control. The event is predicted, and only the Lord can make it stop (Exodus 8:8, 13). Frogs were associated with the Egyptian idol Heqet. Demonstrating power over these creatures was a rebuke to that aspect of Egypt's religion.

The scope of this plague is vast: "all" of Egypt. Some plagues explicitly exempt Israel (Exodus 8:22). Yet the Egyptian people suffer for the arrogance of their ruler (Proverbs 29:2, 4). This plague is not merely on Pharaoh's home or family. The nation will be hopelessly overrun with frogs (Exodus 8:3).