What is SEO and SEM?
If SEO is the optimization of your content for search engines, SEM is the treacherous alternative. An acronym for Search Engine Marketing, SEM implies paying for ads on search engines.
Why SEO matters – search engine optimization
Each year, search engines grow smarter. Each year, search engine optimizers try to outsmart them. At the end of the day, companies like Google have the simple goal to help people find the best content.