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.
Related to Google Alerts Icon
Related icons are the icons with matching tags, as well as all logos icons. All icons are in the same flat style. You can either download free PNG icons or buy SVG vectors