Which Reddit Ads Manager feature allows for the most precise targeting of users based on their engagement with specific content across multiple subreddits?

Custom Audiences, when built using a list of Reddit usernames, offer the most precise targeting based on specific user engagement across multiple subreddits. This feature allows advertisers to upload a list of Reddit usernames and target ads directly to those individuals. This method surpasses interest-based targeting, which relies on self-reported user data, and subreddit-based targeting, which only considers activity within specific communities. By using a list of usernames, advertisers can target users who have demonstrated interest and engagement across various relevant subreddits. While the Reddit Pixel is effective for retargeting users who've visited a specific website, it doesn't directly target users based on their Reddit activity. Therefore, Custom Audiences using username lists provide the most granular control over ad targeting based on specific user behavior patterns within the Reddit platform itself. For example, ads can be shown to people who have commented in both r/gaming and r/pcgaming.