Question

It does not harm to or steel data the least harmful malware is

Answer 1

Adware malware

Explanation:

• This is how it goes down. You go online with your pleasant, well-behaved browser, only to have it have a virtual tantrum as a barrage of adverts jumps up, slides in from the side, or otherwise inserts itself to disrupt and even redirect your intended activity.
• And no matter how many times you try to close those window  s, they continue to buzz around you like flies at a picnic. Adware, or advertising-supported software, is to blame for this annoying phenomenon.
• Money—or the revenue earned by unbidden ads—attracts adware to your PC or mobile device, just as your picnic food attracts the vermin that come after it.
• Adware is unwanted software that displays advertising on your screen, usually through a web browser.
• Some security experts believe it was the predecessor of today's PUP (potentially unwanted program).
• When adware takes control of your device, it can do a variety of unpleasant functions. The software's functionalities may be designed to evaluate your location and the websites you visit, and then show advertisements relevant to the goods or services offered on those websites.
• While adware is more of a bother than a security issue, if the adware writers sell your surfing history and information to third parties, they can use it to target you with more advertising tailored to your viewing habits.
• It doesn't matter if you're using another browser: it'll effect them all.