I am confused about what the door clip does for glitch ps4 runs ( before you do wheelchair man skip) I have seen people do it but is it time beinfitial?

I dont know much about set seed runs but I just created a world and you spawn right on a ruined portal a gravel path ahead of you ahd to the left of the portal has a ruined portal . I havent done much exploration but there could be much more to this seed . There is also a ravien under the portal and exsposed iron

seed:7732445107056967767

Can you guys tell me what the door glitch does im so confused I just dont do it in my run

Any fun/short any % to do for the funs of it