Possibly the most intriguing part of chapter 3 of Understanding Digital Literacies is how information is filed. Tagging is a topic that strikes me as very misconstruing at times. On Youtube videos, website links, and other kinds of sourcing, tagging can easily be abused to reach out to more people for the sake of being noticed.
Several times throughout my Youtube browsing experience, I have experienced this abuse of tagging. Users will most likely include tags that have nothing to do with the video so the video can be found through a number of different searches. What most videos with this abuse of tagging have done is flood the tag section with every possible related popular search. For example, a video of a highlight play of Lebron James could have every basketball affiliated name in the tag section, creating a very confusing search result when one would search for a video of a highlight of another player or team. This abuse is responsible for the widespread popularity of certain videos. Some videos have substantially less substance to them and just spam tags to become popular. A clear sign of this happening is negativity in response.
The nature of tagging is an abusive system, and is often overlooked as one normally has to search deeper into the video statistics for tags. Unfortunately, not much can be done about this as tags don't need permission and can be abused very easily.