Which of the following is software that displays unwanted or sometimes annoying pop-up advertisements that may appear on your computer or mobile phone?

Software that pushes unwanted or annoying pop-up advertisements onto a device is called adware.

Spyware secretly watches activity and steals information rather than showing adverts.

A worm self-replicates and spreads across networks without any advertising purpose.

A trojan horse disguises itself as a useful program to sneak in harmful code.

Adware often rides along with free downloads and generates revenue for its makers through clicks.

Some adware also tracks browsing to target the adverts it displays.