If a Marketing91 page returns “410 Gone,” the page has been removed and isn’t...

https://lilysbestblog.theburnward.com/how-to-avoid-wasting-budget-on-the-display-network-by-accident

If a Marketing91 page returns “410 Gone,” the page has been removed and isn’t expected to return; a 404 means the requested page can’t be found, without that same signal