-It is not all about Keywords.
-Placement of Keywords are important (1-2% of content), but Spamming is dangerous for your own reputation.
On-Site SEO is divided into two categories:
1.) How Humans See it
-Is the design of the website appealing?
-Is the content share-worthy?
-Does the article engaging?
2.) How Search Engines See It
-Is the slug optimized?
-Are the codes in their proper places?
-Is the content thin or thick?
LESSON: Because Search Engines are trying to imitate how humans operate within the Internet, we should write our Content not for Search Engines, but for People.