Every country has its own rules. [4]
The most common labels used on reputable websites are “Advertisement”, “Ad”, “Promoted”, “Sponsored”, “Featured Partner”, or “Suggested Post” in the top or at the bottom of the ads.
Sometimes the brand name of the sponsor is mentioned, as in “Promoted by [brand]”, “Sponsored by [brand]” etc.
However, there is no agreed upon industry-standard disclosure.
And, to make matters worse, some disclosures are hard to understand.
While “Ad” next to sponsored results on a search engine might be clear enough, what does an article “Sponsored by [brand]” mean? Is it like a TV show “Brought to you by [brand]”, or is the brand having a say in the content of the article itself?