Adware is a type of malicious software which displays annoying pop-up advertising banners while a program is running. It presents ads through pop-up windows or bars that appear on the program's UI (User Interface). Some adware can secretly gather your personal information, track your browsing habits or even record your keystrokes. To know more adware and How to Remove it, read this blog https://antivirus.comodo.com/blog/comodo-news/what-is-adware-and-their-removal-methods/?af=9557