Advertorial
Also known as: publireportage
Advertorial is a contraction of advertisement and editorial. It is a special kind of advertisement that has the format of an editorial article. To the reader, it is not abundantly clear that it is an advertisement. Therefore, advertorials are often better read than a regular advertisement, which makes them more effective. Also, an advertorial allows one to put more information about a product or service.
Writing an advertorial is a form of copywriting.