The antonyms for the word "unadvertised" are "advertised", "promoted", "publicized", "announced", "marketed", and "exposed". These words refer to any product, service or event that is being promoted or marketed through various means such as TV commercials, print ads, online ads, social media platforms, etc. Advertisements play a crucial role in attracting customers and increasing sales. Therefore, it's important for businesses to invest in advertising to ensure that their products reach a wider audience. By utilizing effective advertising strategies, businesses can create brand awareness, build customer loyalty, and increase their bottom line.