Search engines give you more status for quality backlinks(article and blog), especially if they are from other sites within your niche. The more status a site has, the higher it will rank (this is especially true in competitive niches).

Content is king in SEO, so article and blog is one of the most popular activities for writing quality content. So both activities are great for your website.

Multiple outside the chain helps to improve the site included .

blogs
 

Multiple outside the chain helps to improve the site included .

because these pages prestigious degree, The articles often be moderated before publication