Alerty Google and other 85,000 icons from Icons8 icon pack follow the visual guidelines of the operating systems: Windows, iOS, Android KitKat, and Material. PNG format is free up to 100x100 px. Icons are availble for download in PNG and vector (SVG, PDF, EPS, and more).
A Google alerts symbol is a bell. The bell is a downward convex shape, and in side the bell there will be a circle that will hit against the bell and make the noise. On the top of the bell there is also a half circle connected, which is where a person will hold the bell.