وَهَذَا الطَّوَافُ طَوَافُ الْقُدُومِ، وَهُوَ سُنَّةٌ وَلَيْسَ بِوَاجِبٍ.
Translation: This tawaf is the arrival tawaf; it is a Sunnah and not obligatory.
Qudūm means arrival, so this is the tawaf associated with the arriving pilgrim. Al-Quduri explicitly calls it Sunnah, not obligatory.
It must be distinguished from the later Tawaf al-Ziyarah, which has a different, obligatory status in the rites of Hajj.