SEO Glossary
SEO Glossary: U
Unethical SEO:
Unethical search engine optimization techniques that are considered unscrupulous and can result in getting sites banned from the search engines.
Unique Visitors:
Unique visitors are a count of individual users who have accessed your web site. It should be noted that the "user session" metric does not yield an accurate unique visitor count, as multiple user sessions can be generated by one unique visitor.
Universe:
The term "universe" in the world of advertising means the total population of the target audience.
URL:
Used interchangeably with web address.
URL Rewrite:
A technique used to help make web site URLs more user and search engine friendly.
Usability:
How user friendly a web site is.
User Agent:
The name of the browser/spider that is currently visiting a page.