Search Engine Marketing (SEM) and Search Engine Optimization (SEO) are two terms that are often used interchangeably but they are actually different concepts. SEM simply means Search Engine Marketing. Search Engine Marketing is the process of obtaining traffic from the organic, contextual, or paid listings on search engines. SEO is the method of obtaining traffic from the paid, contextual, or natural listings on search engines through Pay-Per-Click (PPC) or Search Engine Results Quality (SERC). Both SEM and SEO are essential for successful website marketing campaigns but SEO has the upper hand in most cases due to its ability to achieve higher placement in SERPs. Here are some of the most effective Search Engine Marketing tips that any website owner should implement: