The purpose of Audiences is to show you personalized insights.
Think of it this way: In our database we have dozens of entries from hundreds of thousands of posts published on LinkedIn. We want to make this knowledge available to all users by giving you the opportunity to tell us who you want to reach on LinkedIn.
We search for correlations in our database based on your input and show them to you in the form of predictions.
At the moment it is possible to see the best time to post. In the future, we may add more factors to this feature, such as content format, hashtags and so on.