URL

The url & location of the webid installation on your server. It's usually best to leave these as they are.
Also if your running on windows at the end of the Doument Root there should be a \\ (double backslash)

Doument Root

Database Host

The location of your MySQL database in most cases its just localhost

Database Username

The username, password and database name of the database your installing webid on

Database Password

Database Name

Database Prefix

the prefix of the webid tables in the database, used so you can install multiple scripts in the same database without issues.

WeBid Updater, v to v1.2.1