An AddressSearch Alias is a shortened way of accessing a search engine from the Internet Explorer address bar.
You can change a search engine's alias by editing the search engine in the Options window. An alias must be at least one character long. There isn't a limit on length, though a shorter alias will make it quicker to perform a search from the Internet Explorer address bar.
You can set up an AddressSearch alias for search engines and URL's, but not search groups.