Spyware:Spyware is a type of malware that is installed surreptitiously on personal computers to collect information about users, their computer or browsing habits without their informed consent.
ad.yieldmanager.com is a spyware cookie that Tracks your personal information and browsing habits, as you surf the web. This information can be retrieved by the parent company.
Cookies may contain information about you, such as a password, usernames, how many times you visit a website, how you shop on a website and other surfing habits. Generally there might not be any reason to worry about certain cookies in your computer. Yet the fact remains that a cookie's main purpose is to reveal what websites you've visited and it's up to you whether you want that information to be in the hands of a third-party
Technical details (How to remove ad.yieldmanager.com(pop up))