SEM
Search Engine Marketing: A form of Internet marketing geared towards increasing the visibility of your online store in search engines

SEO
Search Engine Optimization: The process of improving a website’s search engine rankings in order to increase valued visitors.

sitemap
A page that provides search engines with an efficient, alternate route through your site.

spider
A program used to fetch files from the internet for the purpose of indexing in search engines. Also called a web crawler, a spider follows links on web pages to find additional pages to index.

SSL
Secure Sockets Layer: Certificate that guarantees a website’s security from the moment your store goes online. The SSL certificate encrypts sensitive information—such as your customers’ names and credit card numbers—for safe transfer over the Internet.