In the world of SEM, content is king! As mentioned above, consumers will not spend time on your site if the content is not relevant to them. However, even if they do find your content relevant, you need to give them reasons to return.
Offering fresh content on a regular basis – blog posts, articles, resources, etc. – will give your visitors a reason to bookmark your site and come back often to keep up-to-date with the latest your site has to offer.