Unique User

A single individual website visitor. Visitors (or users) can visit multiple pages
within a site. Unique users are important because it is an indication of success
of a website. If you have high visitor counts, but relatively low page per user
counts, that indicates that people are not finding your site attractive enough to
set and read through it. On the other hand, if you have low visitor counts and
very high page per user counts, that is an indication your site is providing good
information to people and you should do a better job a promotion. High page
per user counts indicate good site potential, while low page per user counts
indicate you need to rework the site with more content or better displays.

Upload
The process of retrieving information from any computer is called Downloading.
When one computer sends information to another, it is called Uploading.

  URL
An acronym for Universal Resource Locator. The basis of how we find web sites
on the internet. URL's can include different forms of communicating with a
server: (an HTTP url is Hyper Text Transfer Protocol while a FTP url is a File
Transfer Protocol). You can determine how you are connecting with a site,
by looking at the beginning of a url for the HTTP, FTP, or other protocol identifier.
Most websites are located on http servers and begin with HTTP://.

In the context of search engines, URL's are important because they contain
entities which the search engine may or may not like. For example, your domain
may.

  URL Submission
See Registration. The process of submitting a webpage to search engines.

  User Agent Each time a web browser or other client connect to a web site, they report a
USER_AGENT. Common user agents include Netscape, Opera, and Internet
Explorer. In the context of Search Engine Robots or Spiders, a CGI program can
 read the USER AGENT and deliver custom content to that user or robot.
The User Agent can also be included in a robots.txt file to allow or deny access
to the website.