Question: Pre-article introduction post article addition.

Is it necessary to have a pre-article introduction post article addition? And if so should they be keyword rich according to the keywords of the site or article?

 

If you have written the article, there is no need to add in extra text at the start or finish.  If the article is one you found on the internet that is distributed freely for publication on sites, you should.  The reason is uniqueness.  Using someone elses article means you are using an article that is probably on dozens of websites already.  Posting the article on your site would probably trigger a duplicate content filter at Google and your page would be ignored.  Adding in your own text at the start or end (particularly the start) can help avoid this.