What are these cookies?
Yahoo! displays more relevant advertising based on your browser’s activities on the Yahoo! owned and operated web sites, such as the types of pages viewed or categories of terms searched on. By using this anonymous information (through cookies), Yahoo! hopes to bring more relevant advertising to you.
1. What happens after opting out is that new cookie data is written.
2. Cookies are browser specific and that means you would need to opt out three times if you use 3 different browsers like me (firefox, opera, internet explorer).
3. Your opt out will mean nothing if you set your browser to clear cookies each time it closes.