What are tags used for in online content?

Tags serve the primary purpose of describing content items. They act as keywords that provide contextual information about the content, making it easier for both users and search engines to understand what the content is about. By using tags, content creators can categorize their material effectively, allowing audiences to find related content based on specific topics or themes. This descriptive functionality enhances the overall organization of content online.

While tags can indirectly contribute to increasing visibility, their main role is in classification and description. Filtering user comments and managing data privacy are separate concerns that are not related to the fundamental purpose of tags. Thus, the correct answer focuses solely on the role of tags as descriptors of content items.