A lamb is a young sheep. Lambs need to be led, which is always why they have a shepherd. They can be easily killed by larger animals. They are gentle creatures. A lamb never makes a sound when they shear his wool.
The lamb was always used for burnt offerings, and usually could not have blemishes. The lamb’s wool was as white as snow which is also a picture of our sins being washed away.
In Isaiah 53 we are told that Jesus was brought as a lamb to the slaughter. The lamb is a picture of Christ Who was without blemish and without spot, like unto God. Revelation says that the Lamb will receive power and riches and wisdom and strength and honor and glory in heaven. We are His lambs and we will be with the Lamb in heaven also.