Internet Terminology

Addware
A type of malware that will make you see popup-adds even when you are visiting websites that don't have that type of advertising. In some cases you will also get an extra (useless) toolbar in Internet Explorer.
Backlinks
Links to your site that is counted by google and other search engines towards your 'link-popularity' and 'page-rank'. See my article on the rel-no-follow tag, for links that do NOT count as backlinks.
Browser
Internet Explorer (that big E on your computer screen) is the most used browser at the moment. Alternative browsers include Firefox and Opera. Firefox is said to be safer and offers add-ons that webdesigners can't do without.
CSS
Cascading Style Sheets: the language used by webdesigners to easily change the look of whole websites with changes in only a few style-documents called stylesheets. In the case of myspace: one line of code can change the look of all headings in your profile, including new ones you added yourself. (more  on CSS in myspace profiles: styles & CSS in myspace: colors )
External links (or backlinks)
Links from another site to your site. These are counted as backlinks if the page that links to your site is indexed by google AND is trusted by google. 
HTML
HyperText Markup Language. The language of the web. Webpages are all written in HTML.
Internal links
Links from pages within your site to other pages within your site.
Internet Explorer
The Big E on your computer screen when you start-up Windows. You probably use it to browse the Internet. It's only one of a selection of browsers, and not the safest. I personally use .
Malware
Software that gets installed on your computer because you clicked 'OK' or 'Install' when you thought you were merely getting to see a video or something. Instead you get lots of popups and a slower computer. Malware is usually hard to get off your computer. If you have it, get your most computer-savvy friend to look your computer over. To prevent malware, don't use Internet Explorer as your browser, but install or Opera. I use Firefox myself. (see spyware and addware)
Outbound links 
Links from your site, to another site.
Phishing
Duping Internet users through fake websites of banks and other trusted institutions, in order to steal their passwords. (more on phishing )
SEO
Search Engine Optimisation. The art of getting a website to be found in search engines. See SEO for Dummies.
An SEO (plural SEOs) is a person who specializes in Search Engine Optimization.
SERPS
Search Engine Results PageS. For instance: my page on webdesign currently ranks no. 21 in the SERPS for 'webdesign'. This means that that page is found at the 21nd spot when searching for 'webdesign' in a search engine. When the precise engine is not mentioned, google is usually implied.
Spyware
A type of malware that when installed will steal personal information like credit-card information from your computer.
Tags
Within HTML there is code for hyperlinks, headings and paragraphs (for instance). This code starts with < and ends with >. For instance for a paragraph there is <p> , which starts a paragraph. <p> is called a paragraph-tag. The closing tag is always </...> or in the case of a paragraph: </p> , which tells the browser that the paragraph is ended. See also link and image tags and style tags.