While it is true that Earth is bombarded by small meteoroids frequently, most of them burn up in the atmosphere before reaching the surface. These are known as meteors or shooting stars. When a meteoroid enters the Earth's atmosphere, the friction with the air causes it to heat up and vaporize, creating a streak of light that we see as a meteor.
Only a small fraction of the meteoroids that enter the Earth's atmosphere actually survive the intense heat and make it to the surface. These are called meteorites. Meteorites can leave visible signs such as impact craters when they strike the Earth, but their occurrences are relatively rare compared to the number of meteors that burn up in the atmosphere.
The Earth's atmosphere serves as a protective shield that helps to vaporize and disintegrate the majority of small meteoroids before they reach the surface. This is why we don't see visible signs of meteor impacts everywhere. However, there are certain regions where larger meteorites have impacted the Earth and left visible craters, such as the Barringer Crater (also known as Meteor Crater) in Arizona, USA, or the Chicxulub crater in Mexico, which is associated with the mass extinction event that wiped out the dinosaurs.
It's worth noting that even though most meteoroids burn up in the atmosphere, they contribute to the cosmic dust that constantly settles on Earth. Scientists study this cosmic dust to learn more about the composition of our solar system and its history.
In summary, while meteoroids do impact the Earth frequently, the majority of them burn up in the atmosphere, resulting in meteors or shooting stars. Only a small fraction make it to the surface as meteorites, and visible signs such as impact craters are relatively rare compared to the number of meteors observed.