Source: MarketingTerms.com

Ad Blocking – the blocking of Web advertisements, typically the image in graphical Web advertisements.

Banner Blindness – the tendency of web visitors to ignore banner ads, even when banners contain information visitors are actively looking for.

Buzzword – a trendy word or phrase that is used more to impress than explain.

Cloaking – an SEO black hat technique in which the content presented to the search engine spider is different to that presented to the user's browser.

Cookie – information stored on a user's computer by a Web site so preferences are remembered on future requests. However when used with best practice intentions is very useful.

Email Spam – unwanted, unsolicited email.

FFA – free-for-all links list, where there are no qualifications for adding a link.

Incentivised Traffic – visitors who have received some form of compensation for visiting a site.

Mousetrapping – the use of browser tricks in an effort to keep a visitor captive at a site, often by disabling the "Back" button or generated repeated pop-up windows.

Opt-out – (1) type of program that assumes inclusion unless stated otherwise. (2) to remove oneself from an opt-out program.

Pagejacking – theft of a page from the original site and publication of a copy (or near-copy) at another site.

Spam – inappropriate commercial message of extremely low value.

Search Engine Spam – excessive manipulation to influence search engine rankings, often for pages which contain little or no relevant content.

Trick Banner – a banner ad that attempts to trick people into clicking, often by imitating an operating system message.