Stealing the source code of a particular web page and re-publishing it somewhere else. Pagejacked content is fortunately not very effective as search engines generally ignore duplicates of pages that they already indexed.
PageRank is Google's proprietary measure for link popularity. It measures the number and quality of links pointing to a site and uses it as part of its ranking algorithm. In theory, the higher the PageRank of a site, the better it performs in search engine results pages (SERP's).
Advertisements usually displayed alongside or above regular or "organic" search listings. Paid listings are paid for by the advertiser. It is considered good practice to clearly differentiate paid listings from organic search results.
PayPal enables anyone with an email address to send and receive money over the Internet. It's an attractive alternative to credit cards and makes it easy for webmasters to accept payments on their web sites.
A new approach to marketing developed by marketing wiz Seth Godin. The idea is that your marketing efforts will be significantly more effective if your audience gives you permission to contact them. The hard part is getting permission by offering them true value first.
A page on a web site where the company states its policy regarding the use of visitor information. It discloses what information about users are collected on the site and how the company will use that information.
Something is considered to be in the public domain when now copyright exists on the material - usually because copyright has expired.
The vast majority of information on the web is not public domain. Even when information is made available for free (like the definitions in this dictionary), copying and republishing the information on your own web site would be a copyright violation.