http://www.ppctopics.com Just another WordPress weblog Fri, 22 Jun 2007 15:41:24 +0000 http://backend.userland.com/rss092 en Search Engine Marketing, or SEM, is a form of Internet Marketing that seeks to promote websites by increasing their visibility in the Search Engine results pages (SERPs) and has a proven ROI (Return on Investment). According to the Search Engine Marketing Professionals Organization, SEM methods include: Search Engine Optimization (or ... http://www.ppctopics.com/general/search-engine-marketing-information/