not without a picture.
if it is in the status bar, slide down from the top of the screen and you will see a notification for this symbol. click it and see what happens. if it takes you to some weird web site, it is an ad, if it opens an app, it is an app notification.
if the icon is on the home screen and just appeared, it is probably an ad as well. download "airpush detector" from the play store and run it....it will tell you what app is pushing apps to your home screen....i would delete the app because it is constantly going to do this.