WP Cron Brief Explanation

WP-Cron provides a rudimentary support for scheduled exection of actions; a sort of ??delayed action?? processing for WordPress. It is nowhere near as robust as the actual UNIX cron facility, but should be good enough to ??do stuff?? on a fairly regular basis.
What with human beings, search engine spiders, and content aggregators, we can be fairly sure that even the most uninteresting (public) blog will be visited with some regularity. WP-Cron relies on this regularity to schedule the execution of three new plugin hooks. These hooks execute roughly once every fifteen minutes, every hour, or every day.