Media Manager is a CMS tool for created recommendation feeds, as well as authoring articles or image galleries.
The types of media you can choose to create are Article, Image or Smart Feed --
Smart Feed, is your go-to for creating a smart recommendation feed, one that can showcase to your users any similar content that they might enjoy based on what they like. Choose a Title, Subtitle, Description, and input Search Tags. These search tags will filter through your content headlines, description text, and meta tags to create a filtered "Smart Feed" that you can update on the fly.
Any Smart Feed you create will show up in your dropdown menu in +Content in Experience Creator.