SEO vs SEM: Do You Know The Difference? Business owners often ask me about the difference between SEO and SEM. So this month I’m going to explain both and how each affects the ability of your Website to be found. Search Engine Optimization (SEO) is work performed on your Website to help it to be found on search engines. This can include: Adding search engine friendly page titles and descriptions to your Site Having keyword rich text content on your site Tagging images wit