Follow certain rules; Be mindful about one's actions; Represent oneself or one's religion with respect in public.

This hadith is narrated by Ibn 'Abbas and it states that the flag of the Prophet Muhammad was black while his standard was white. This hadith is important as it shows us how even in small details such as flags and standards, there were certain rules that were followed by the Prophet Muhammad. It also teaches us to be mindful about our actions and to follow certain rules even in small matters. Furthermore, this hadith also serves as a reminder for us to be mindful about our actions when representing ourselves or our religion in public.