Where the main focus of my attention should go while I am on stage?

I have spoken with a lot of pro musicians and the answers are different every time. For example some of them are stressing out that you should be more focus on the crowd and their reactions others are advising me that I should be 100% focus on my performance ignoring all the distractions related to stage events... This is really confusing so I would love to hear some field experience from you guys.

Sophia Jackson