Content which is dynamic in nature and gives people a reason to keep paying attention to your website.
Many SEOs talk up fresh content, but fresh content does not generally mean re-editing old content. It more often refers to creating new content. The primary advantages to fresh content are:
- Maintain and grow mindshare: If you keep giving people a reason to pay attention to you more and more people will pay attention to you, and link to your site.
- Faster idea spreading: If many people pay attention to your site, when you come out with good ideas they will spread quickly.
- Growing archives: If you are a content producer then owning more content means you have more chances to rank. If you keep building additional fresh content eventually that gives you a large catalog of relevant content.
- Frequent crawling: Frequently updated websites are more likely to be crawled frequently.