I do not generally discuss PPC issues very much, because although it is related to SEO, it is not a direct form of optimization. Still, it is an important part of SEM and website promotion. In addition, if your good rankings suddenly disappear, PPC may be your best option for keeping your business alive. If you are unfamiliar with PPC, you may not know what choices you have. A list is available at www.wedid.com/pay-per-click/all_pay-per-click.html. While most of these are probably not going to send much traffic your way, it is still helpful to see what choices are available. So, if you are used to having high organic rankings and suddenly find your site has disappeared from the SERPs, it might be time to see what other options you have.