Here's the summary for the wikipedia article you mentioned in your comment:

An advertorial is an advertisement in the form of editorial content. The term "advertorial" is a blend (see portmanteau) of the words "advertisement" and "editorial. " Merriam-Webster dates the origin of the word to 1946. In printed publications, the advertisement is usually written to resemble an objective article and designed to ostensibly look like a legitimate and independent news story. In television, the advertisement is similar to a short infomercial presentation of products or services.

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