we wanted to have the config as flat as possible. Sonata just maps its big SeoPage-Array as from the complete config. You will find all metas - means everything you have configured there, when you call `$sonatSeoPage->getMetas();`. So the description is under `sonata_seo.page.metas.name.description`. As we have the `meta.name` in once and in our extra properties, we do not need that depth just for consistence.