From Longman Dictionary of Contemporary Englishadvertorialad‧ver‧to‧ri‧al /ˌædvɜːˈtɔːriəl $ -vər-/ noun [countable] an advertisement in a newspaper or magazine that is made to look like a normal article
Examples from the Corpus
advertorial• A gardening magazine might be interested in advertorials on growing certain types of plant on different soils or on dealing with pests.• Home decorating and colour scheming advertorials might be offered by paint and wallpaper companies; indeed the opportunities are many and varied.From Longman Business Dictionaryadvertorialad‧ver‧to‧ri‧al /ˌədvəˈtɔːriəl-vər-/ noun [countable] MARKETING an advertisement that uses the style of a newspaper or magazine article so that it appears to be giving facts rather than trying to sell a productThe advertorial is intended to look as much like the other editorial pages as possible.Origin advertorial (1900-2000) advertisement + editorial 