Learn the importance of properly tagging your YouTube videos. This will help your videos get discovered and found on the search engines! Plus, Derral will teach the YouTube Best Practices on utilizing tags in your video and will give you the four tags he always uses.
YouTube uses meta information like tags to rank your video. Until they are able to collect enough information on their own and make their own assessment. (i.e. Watch Time) Tags in your YouTube Videos are really important.