Please Help, I cannot answer this

Hello, I’m trying to code in the Reddit Pixel to my store, but I need to get my advanced matching parameters to work. I’ve searched and searched for the right thing to put in for these, but I can’t find a straight answer anywhere.

How can I find what to enter between my <> brackets to get this information to pull when the script it lives in runs.
“aaid”:“<>”,
“email”:“<>”,
“externalId”:“<>”,
“idfa”:“<>”});

Niyeepo, thank you for this elaboration.
I’ll look to see if I can find this info and attempt a build in my own store to test.