want to attach a unique label on the blog article
I think the label is in the blogger is a topic of discussion. The function of the label is so that we can classify articles based on the labels / categories are the same, and facilitate visitors to the blog to see other articles by Label / Category. The label is also useful in the column Related Articles, Related Post or other based on the label articles.
Of course you often see sentences Related Posts, Related Articles, Also Read These, and the like under another blog article. Related Articles Related Post or it will not appear if the article we do not have a label / category, despite being in pasangi script related post.
To Use the labels already on bloggers provided was very easy. You can just browse or write labels / categories on each article that you created on the labels, located on the right. The label on Blogspot can also be regarded as a category of articles are made, these labels help us and also the reader to classify articles based on the field or a particular type.