Joyce, it may well be malware, or a leftover from some adware you picked up. If you search for the name, there are removal steps lined up to get rid of it. This is not likely to just go away on it's own. Removal is not difficult.
When you post something like this, it is helpful if you say what computer you are using, (pc, Mac) what operating system, and which browser you use. Also note what you've done already to correct it. No point in having people playing 20 questions to get at the basics.
There is a reason that the first question support people ask about a dead computer is, "Is it plugged in and turned on?"
Jim