The default page title in Joomla 1.5 is "Welcome to the Frontpage".

You can easily change that from your Joomla admin area > Menus > Main Menu > Home > Parameters - System > Page Title.

Type in the new page title you wish to use and save the change. Next time you open your website, the new page title will show up in your browser :)

If you are having problems with your Joomla, you may ask your host for assistance. SiteGround provides the best Joomla hosting and we will assist you with any Joomla questions/problems you may have.