You want to go through these and make sure that if you have an important keyword that you have not yet targeted, you do so, and likewise, that if you've got a URL, a page on your website that you have not yet intentionally targeted a keyword with, you make sure to do that as well. This can be a great way to go through a small site in the early stages and make sure that you've got some terms and phrases that you're actually targeting. This will be also helpful when you do your rank tracking and your on-page optimization later on.
That content CAN be on links to your own content on other pages, but if you are really helping a user understand a topic – you should be LINKING OUT to other helpful resources e.g. other websites.A website that does not link out to ANY other website could be interpreted accurately to be at least, self-serving. I can’t think of a website that is the true end-point of the web.