The phrase "a unique audience of" is correct and usable in written English.
It can be used when describing a specific group of people who are distinct or different from others in a particular context, often in marketing or communication.
Example: "Our campaign targets a unique audience of young professionals who are interested in sustainable living."
Alternatives: "a distinct group of" or "a specialized audience of".
There is fierce competition between the news websites: the latest Nielsen rankings show news.com.au is No 1 with a unique audience of 5.3 million.
As you can see in the tables below, the next-closest mobile travel players behind Google Maps are pretty far behind: it's Gas Buddy at 9 million users in apps, and TripAdvisor in mobile web, with a unique audience of 4 million.
Nine of the top ten rated news shows are on Fox, which reaches a unique audience of Americans that tunes out most if not all other sources of news and information.
According to SocialGuide.com, a social media analytics company owned by Nielsen, the Season 3 premiere of ABC's "Scandal" was the most tweeted-about show of last week Sept . 30 to Oct. 6); the show was mentioned in 713,000 tweets that were seen by a unique audience of 3.7 million twitter users, generated by 179,000 unique authors.
Thanks to the success of its iPod music players and iTunes service, Apple saw the biggest growth in the UK top 10 in 2005, up 56% to an unique audience of 6.2 million.
People who like to like listening to bands "in beautiful gardens on the Dorset/Wiltshire border" do not count as a unique audience, End of the Road Festival.
"With SoundCloud, the biggest question is whether or not they can serve a unique audience". SoundCloud hopes its network of dedicated fans and wide array of underground artists will give it a competitive advantage over other companies that offer a similar library of songs for the same price of $9.99 a month.
"Unique audience of Tweets ascribed to an airing is measured from when the Tweets are sent until the end of the broadcast day at 5 a.m".
According to Nielsen/NetRatings data, both the WWF and WCW do well on the Web, although the WWF has about four times the unique audience of its rival and more than six times the page views.
Similarly, launching this GIF Maker tool is about catering to Tumblr's unique audience of creatives who post, reblog, as well as like and comment on content they find not because they know each other, but because they're all into the same sort of things.
Every retailer reaches its own unique audience of readers.
