It was narrated that Al-Aswad said: 'Aishah said: "The Messenger of Allah ﷺ never entered upon me after 'Asr but he prayed them (the two Rak'ahs)".
Additionally, this hadith teaches us about discipline and commitment to our religious obligations; even though these are not obligatory prayers they should still be taken seriously in order to reap their rewards in both this life and the hereafter. Furthermore, it shows us how important it is to follow the example of the Prophet Muhammad PBUH in all aspects of life; if he did something then we should strive to do so too in order to gain closeness with Allah SWT.