What does Genesis 7:14 mean?
The previous verse described in more detail the eight human beings who boarded the ark on the day the rains came. This verse gives a bit more detail about the non-human occupants of the boat.It important to remember that Genesis claims a supernatural work of God in gathering and delivering these animals to the ark. God wanted to save a representative of every kind of beast, every kind of livestock, every kind of "creeping thing" (which would include insects), every kind of bird, and every kind of winged creature. As some have noted, such a collection of predators and prey, of large animals and small, could never have occupied such a space together if God had not orchestrated it for the purpose of preserving animal life on the planet.
The repetition of this information is also part of the story. A theme of Genesis is God's ability to make good on His promises. Earlier parts of this story describe what God is predicting, later ones describe those events happening exactly as God said they would. Rather than simply saying, "animals went on the ark," Scripture emphasizes the details. This highlights the idea that God's will, and His knowledge, are specific.