Adware

Adware is a yucky software that sneaks into your computer when you download or install free programs or games.
Adware is like a bad friend because it keeps showing you lots of annoying ads that you don't want and it can slow down your computer.
It's like if someone kept poking you with their finger while you were trying to play, watch a video or work on something.
Adware can also track what you do on your computer and collect your personal info.
It is important to avoid downloading or installing anything that you don't trust and to use an antivirus program to detect and remove adware.