Genesis 2:1-3 meaning

Genesis 2:1-3 is a conclusion to all of chapter one. God had finished His work. Since He was done, it was time to rest. Later in the book of Exodus, God would set apart the day of rest and make it holy. The word used for rest here is the Hebrew word "shabath" which means to cease or to be still. God wasn't exhausted and in need of rest from His labor. No, God declared the work to be finished. God did not just take a break from His work, He had achieved His divine plan of the universe.

Then God blessed and sanctified the seventh day (v 3):

"For in six days the LORD made the heavens and the earth, the sea and all that is in them, and rested on the seventh day; therefore, the LORD blessed the Sabbath day and made it holy"
(Exodus 20:11). 

The word blessed means God's divine favor and protection was given. The word sanctified means to make holy or to set aside. The seventh day was sanctified as a special day of blessing. The Sabbath would become a reminder of two great truths, creation and redemption. God's work is perfect and nothing can be added to it or taken away from it. Here is a good example from Scripture,

"I know that everything God does will remain forever; there is nothing to add to it and there is nothing to take from it"
(Ecclesiastes 3:14a).

The seventh day was set apart and proclaimed to be a holy day. God ceased from all the work He had set about to do.