If your homepage is not already being optimized for other keywords, it’s best to use it. You can also use other pages that have content similar to the keywords being targeted. Another option is to simply add or change content on a page to match the keyword.
Although it is not required, selecting pages that have a higher “Google PageRank” rating greatly increase our ability to get rankings for you. You can view the PageRank of your Webpages here.
You can assign up to 2 keywords per Webpage.