Always use only relevant SEO Keywords !
Search engines around the world (Google, Bing, Yahoo and others) evaluate your website for usefulness to users based on the content that maps on your website.
Base of content is any text or articles with SEO keywords that describe with maximum accuracy what exactly your site is offering.
It is by keywords that search engines determine whether the information on your site is suitable for what the visitor is looking for.
All keywords together constitute the semantic core of your site. It is the data from semantic core serve as basis for website promotion in the search engines.
This information is relevant as for personal blogs, informational or corporate websites, as well as for eCommerce projects.
SEO Keywords is a Key for succesful of your project.