"Tras" was in one of the texts we read in Spanish class once and when I looked it up on spanishdict, it said it means "after".
However, when I asked two of the Spanish teachers at my school and my friend who is a native speaker if I could use "tras" interchangeably with "después", they all told me that the two were not the same.
They all told me something about how "tras" is for things directly after another, but I did not really understand it.
Could anyone provide a rule for using the two?