It is the daily motion of stars and other celestial bodies across the sky due to Earth’s rotation.

Set of constellations visible in the sky during the different times of the year

This phenomenon results in the Sun  being covered for a few minutes and it becomes dark outside

In the Svalbard archipelago, Norway's crown of islands in the High Arctic, the sun can be seen 24 hours a day from late April to late August. What phenomenon is observed?

It results in a "nearly" equal amount of daylight and darkness at all latitudes.