Marketing 🔒
Heads up: anuncio covers both an advertisement and a general announcement. You will see it on billboards and also in internal emails that open with tenemos un anuncio importante. In a marketing context it always means ad, but elsewhere it simply means notice or announcement.
Keep in mind: marca does not only mean brand in the commercial sense. It can also mean a mark, stain, or record. In sports, marca mundial means world record. In business contexts it is always brand.