Describes something characteristic of, limited to, or focused on a particular region or locality.
This dish has strong regional characteristics.
Local issues are handled by the local government.
全国的 describes something spanning the whole country, whereas 地域的 describes something limited to a particular region.
regional distribution
Compound of 地域 (chiiki, 'region') + 的 (-teki, '-like, -al'). The suffix 的 is a productive way to form adjectival nouns from nouns.