Excellence of sending prayers upon the Prophet (saws)

وَقَالَ صلى الله عليه وسلم:(إِنَّ لِلَّهِ مَلاَئِكَةً سَيَّاحِينَ فِي الْأَرْضِ يُبَلِّغُونِي مِنْ أُمَّتِي السَّلاَمَ)

It was narrated that Abdullah said:"The Messenger of Allah (ﷺ) said: 'Allah (SWT) has angels who travel around on Earth conveying to me the Salams of my Ummah