The YAHOO! Tool bar is the same exact thing as Google Toolbar...it has good features. From Yahoo toolbar, you can quickly search for sites, access your Yahoo E-Mail account, block pop ups and much more. It installs a toolbar in at the top of your browser window that has all these features. If you had to pick between Yahoo Toolbar and Google Toolbar, go with google, only because yahoo's toolbar takes up more space in your bwoser window than the google one does.