The phrase "advertised protests" is correct and usable in written English.
It can be used to refer to protests that have been promoted or publicized in some way, often to attract participants or attention.
Example: "The city was filled with people attending the advertised protests against climate change."
Alternatives: "publicized protests" or "promoted protests".
As India awoke Saturday to the death of a 23-year-old woman who has become a symbol of what many say all that is wrong with the way women are treated here, the country's young, social-network-savvy population sprang into action, organizing and advertising protests, candlelight vigils and marches from Cochin, Kerala, to India's outsourcing headquarters of Bangalore to Mumbai's Juhu Beach.
As a graphic designer, he said, the posters and fliers he made advertising protests on Inauguration Day account for the bulk of the files on his devices.
He said he ordered the Labor Day enforcement action after boaters "got so brazen" that they advertised their protest in a local weekly newspaper.
The government also reserves the right to identify organizers itself: whereas before the people who petitioned the authorities for a permit were held responsible (and have been punished) for demonstrations, now the authorities can call someone an organizer — and fine him or her as such — because he or she has, say, advertised a protest on social networks.
Another, Greenpeace, developed the hallmark tactic of boarding vessels at sea to advertise its protests.
When about 50 of them took to the streets in the late afternoon, handing out pamphlets advertising the protests on Tuesday, they were met with a bemused but generally positive response.
Professional-level videos advertising the protests?
It was also used as publicity by loyal supporters of the anarchist, socialist, and labor movements, appearing in broadsides and posters advertising protest meetings and rallies to be held in the U.S. and abroad.
The protests, advertised widely through social media networks, gradually spread.
It is of course difficult to know where this intelligence came from - it may be a simple matter of police reading websites or leaflets advertising a protest, or it may have originated directly or indirectly from undercover officers.
