Hi On my site a have a page for each service i offer my customeres. On every page in Field Tag keywords I have keywords simular to the service

About SEO/ Ranking on Goolge  what is best

a) Type the keywords simular to the service as a part of the text on every page

b) type ALL the keywords for all pages  in a page called keywords

C) do b on my wordpress blog connected to my site

Thank for helping

Claus