It's like a phrase that you say after hearing something disappointing, strange, bizzare etc.
It's also like if you don't go around the world and leave the house u won't get to witness and experience all these things
I hope it makes sense, u can add on to this explanation if u know what it means
1. Yoh that girl has 3 children and she is only in grade 7, Hai 'to go is to see'.