Meta Tags Keywords
 

Unique keywords that are assigned to each particular page of your website and these words must also be include in the actual page content.

yes your concept is right but there is another issue as well that is the finest website structure.

Meta keywords are completely irrelevant and it's the status since 3-4 years. Please don't expose keywords you are targeting to your competitors.

Meta tag is necessary for webpage to identify.

For futher details read Google Webmaster Support Page

Ya if u add appropriate keywords to the landing page correctly then it brings in more ranking and traffic