If you want high traffic for your blog, then you need to write SEO articles with demanding keywords.

If you write a post with some obscure keyword, it won’t get much traffic from search engines.

But if you write article with highly competitive keyword, your article will be competing with thousands of other articles.

So, it’s best to pick keywords that have high enough search demand and are underserved, which basically means less articles are competing.

You can do keyword research with Google Keyword Planner, or by buying some keyword research tool.