Internet Marketing is an all-inclusive term for marketing products and/or services online and like many all-inclusive terms, Internet marketing means different things to different people.
Essentially, though, Internet marketing refers to the strategies that are used to market a product or service online, marketing strategies that include search engine optimization and search engine submission, copywriting that encourages site visitors to take action, web site design strategies, online promotions, reciprocal linking, and email marketing and thats just hitting the highlights.
Online marketers are constantly devising new Internet marketing strategies in the hopes of driving more traffic to their Web sites and making more sales; witness the increasing use of blogs as marketing tools for business, for instance. (For more about creating a blog and how to use blogs as an Internet marketing strategy, see my Blog FAQ For Businesses.)
If youre new to Internet marketing, I recommend focusing on web design and search engine optimization as a starting point; for most sites, the most traffic still comes from search engines and directories.