What Are Attributes?
Attributes are similar to rich terms. They are like tags that represent key terms and concepts (usually nouns) that exist in the article. These terms live in the html code as meta data. Attributes are just more specific than rich terms are to the content item. For example, an attribute of a recipe could be meal type: breakfast, dinner, etc. while those could also be rich terms, the attribute is seen as even more specific.
Players: The player or players selected will work similar to hashtags on social media. They tell the algorithm the most specific terms that the article will be focusing on.