Was last seen viewing

When you click on some one's name, to view there pop up profile page, i see that some peoples you cann't see " Was last seen viewing" etc, just thinking how do you change this please

 

Thank you Woo

I've been trying to change it, click this , click that, then i click my name to see and it was the same but view it off line and it was not there, I think i was having a bag hair day again