Use of Multiple Tags

[Gamer07]

Hi, I have been monitoring some of the authority sites and I noticed something with one of them. This high authority site suddenly started using multiple tags for each post.

And I mean, loads of tags, not just three of four. I see that each post comes with at least 10-20 tags. And these tags don't always make sense either. Let's say there is a video for "Bourne Legacy", they list tags like bourne, bourney legacy, bourne series, bourne videos, videos, crime movies, movies, crime etc.

They don't even seem to care about duplicate content issues. Let's say the movie is named The Dragon, they would inclue dragon and the-dragon in tags list and despite those two category pages(/dragon and /the-dragon) being exactly the same now, they still wouldn't mind listing both the tags underneath the article.

And no they don't use canonical tag. (there isn't even a canonical meta on any page of that site)

So I am curious.

Do they just know they have a very high DA, they don't need to worry about duplicate content issues?

or; I am missing something here? Maybe the extra tags are doing more good than harm?

[Highland]

Tags, in blogging, are a collection of posts by type. They are very useful for sorting content.

In your case, you're describing where they have tagged a given post with, say, 10 tags. But the post itself cannot be accessed via multiple URLs, can it? If the answer is no (and I suspect it is) then duplicate content doesn't come into play because, using your example, the post in question would be something like domain.com/posts/bourne-movie and simply linked in those different categories.

At worst, they are wasting efforts making so many categories (and I probably wouldn't make so many myself) but multiple categories isn't a horrible thing as long as the content pages are unique.

[Gamer07]

** duplicate content doesn't come into play **

**I was referring to the category pages when I said "duplicate content". Because the category pages (for similar tags) are identical (some of them) and they are indexed.  **