That you may go about therein in broad roads.
meaning, He created it so that you may settle in it and travel in it wherever you wish, from its different sides, areas and regions.
All of this is from what Nuh informed them of concerning Allah's power and His greatness in creating the heavens and the earth. It demonstrates the favor that He did for them by making both heavenly benefits and earthly benefits. For He is the Creator and the Sustainer Who made the heaven as a building and the earth as a bed, and He enlarged His provisions for His creatures. Therefore, He is the One Who it is obligatory to worship, and accept as One God. No one should be associated with Him as a partner, because He has no equal, peer, rival, coequal, mate, son, minister or advisor, rather He is the Most High, the Most Great