Why do I need to create unique content from time to time?

[Max]

The reason you need to add content to your site or blog regularly is to show search engines that your site is valid and continuing to grow, expand and remain relevant.

The reason you need to add unique or original content is any replica content has already been written, so there is no reason for your content to show up in search engines. If its original then their may be a reason for people to want to read it.

adding original quality content can be achived easily through forums, blogs and other social applications.