• Adware, or advertising-supported software, is computer software that shows unwanted advertisements. Adware applications will flood your device with adverts by displaying pop-up ads, changing your browser's homepage, installing spyware, and bombarding you with pop-up ads.
• Potentially undesirable programmes are referred to as adware. It's not quite a virus, and it doesn't appear to be as malicious as a lot of other malicious code on the Internet. Make no mistake about it: adware must be removed from whatever PC it is on. Not only may adware be inconvenient every time you use your computer, but it can also cause long-term problems.
• Adware collects your web surfing data through your browser in order to 'target' advertising that appear to be suited to your interests. Adware infestations are bothersome at their most basic level.

Read More: What is Spyware?