My driveway has some cracks. I filled them with cement at first. After it was dry, I then covered them with "Asphalt Driveway Crack Filler" since it can be used only for 6mm thick. Otherwise, it is hard to dry. If it is not dry, it will not work. If you use cement only, cement will crack later. I did this for the gap in front of the garage too. I saw some prorfessional work for the gap which does not seal the gap. If there are cracks, they should be repaired. Otherwise, they get larger and larger. In the end, the driveway needs to be redone. It is expensive.