Tags are a classification that you add to a post in a blog software or forum that creates an inhanced sort of category system. Where posts that have some portion of similarity can be grouped to a page. I notice that it helps to have a few more tenticals out in the web.

In the end it gives a way to categorize posts that may not fit well in your current categorization scheme but would make sense for a user searching a certain keyword.

I hope I did not completly confuse you and if I did I will try to explain it in a better way.

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