Algorithm, Search & Distribution
Hashtag page
Also called: hashtag landing page
Click a hashtag anywhere on YouTube and you land on its page, which lists the videos and channels using that exact tag and nothing else. Hashtags in a description also surface above the video title, which is how most viewers meet one.
It works better as a research surface than a traffic source, since it shows how many videos already use a tag. Two limits. Put more than 60 hashtags on a video and YouTube ignores all of them, and on Shorts hashtags no longer move discovery in any meaningful way.