ok keywords work like this. lets say you offer templates. if its ipb templates you offer your first keyword would be ipb templates after that ipb themes so 2 keywords would go ipb, templates, ipb themes, ipb, templates, themes, <<<< we already used 5 keywords here first 10 keywords is the key of the success of the site. Keywords is what people type in search to try and find you. Hope this explains bit more.