Newbie question about Understanding Facebook URL

I'm not really active on fb for many years but can somebody explain me
why does some facebook url's end up like this

facebook.com/p/NameExample-111111111111111/

and some like this

facebook.com/NameExample/

What does the /p/ stand for ? does it mean its a non facebook business ads account ?
or not necessarily ?

So, on Facebook, the URLs can look a bit different.
If you see something like facebook.com/p/NameExample-111111111111111/, that usually means it's a profile or page that hasn't set a custom username. Facebook assigns these numbers instead of a username.
It's not necessarily about ads or business accounts—it's more about how the URLs are structured based on whether someone customized their profile or page name.
Hope that helps, cheers!

There will be updates from time to time, so you have to check this to be able to catch the trend.