Not rooted after having a pass result using Odin 3

Hi XDA! Please help me with my problem. I'm a newbie in rooting my android. So after I followed instructions in rooting my S6 Edge SM-G925F with the 5.1.1 version of the android using Odin3, SU app is not installed after finishing the steps. but the red seandroid kernel letters are showing at the top of the samsung logo.
:confused: