The first applications are beneficial and most of the time necessary to use all of the functions of a website. Blocking cookies on a website that is storing session information in them will have the result that the user is asked for authentication whenever he loads a new page on the server.

Tracking cookies on the other hand do not benefit the user at all unless you would say that targeted advertisement is beneficial. It does not really make sense to enable cookies for all websites, especially those that use them to track the user. It’s more of a privacy issue but one that many users take serious.

Most browsers either come with build in features to enable cookies on a per site basis or provide extensions and add-ons that make it easy to enable cookies only on websites where cookies are necessary for the website to function properly.Firefox users can for instance use the excellent CS Lite Cookie Manager.

Internet Explorer comes with some settings in the Internet Options that can manage cookies effectively has a few options as well but not as man as Internet Explorer.