Tags are a cool thing, if you use them correctly - went somewhere on delicious, chose a favorite topic and read to yourself. But reading tags in a blog is not very convenient. And that is why: read the posts of the first tag, everything is fine, reached the last page. Go to the second tag, and we feel some disappointment - half of the articles are repeated from the first tag.
Or the second option - we read all the articles in a row, and we are not interested in articles about the life of the jerboas.
')
The idea is to be able to exclude from the list of all articles, articles marked with the tag "life of jerboa" and continue to enjoy reading.