Reddit is composed of more than 50,000 active communities with 280 million unique users around the world. Targeting a community, or subreddit, allows you to reach the exact audience interested in a specific topic.
If you have a new music app you want to promote to Reddit's music communities, you could target the Music subreddit. This is also known as music.reddit.com and reddit.com/r/music.
Targeting a subreddit means you are targeting the subscribers and visitors of that subreddit. Subscribers can see your ad on their frontpage, when browsing r/all, and while visiting the targeted subreddit. Nonsubscribers will only see your ad when visiting the targeted subreddit.
Adding a subreddit target to your ad: