Let's say you do not like the default admin URL therefore you adjusted the folder name from "admin2344" to "backoffice". The new URL is the combination of your area identify (or your Shop URL) with "backoffice". This is often also for protection factors, in order to’t use the title admin https://addons.prestashop.com/fr/seo-referencement-naturel/31857-seo-automatique-google-rich-snippets-json-ld-open-graph.html