Which types of keyword linking best for SEO?

Thanks for the details

Any word that has to do with whatever it is you are promoting. Any word that would make your article/page "stand" out.

its should long tail keywords.. and brand keywords!

Using the keyword title of the page. Every page target on keyword.

7 types of keywords to boost your SEO

Market-defining keywords
Customer-defining keywords
Product keywords
Industry thought leaders
Competing company names
Related vertical keywords
Geotargeted keywords

Using the keyword in the title of the page
Using the keyword in the URL (e.g., growingtab.com)
Using the keyword, and variations (e.g., "gourmet parakeet snacks"), throughout the page copy
Using the keyword in the meta tags, especially the meta description
Using the keyword in any image file paths and in the images' alt text
Using the keyword as the anchor text in links back to the page from elsewhere on the site

Long tail keywords and brand keywords.