Google's John Mueller reminded us that when it comes to your CSS background images, Google won't be indexing or ranking those images in image search. John Mueller said on Twitter "last I checked ...

Google's John Mueller said this morning in a webmaster hangout at the 20:55 mark that Google Image search does not index and rank images from CSS background code. He said if you want your images ...

Add a short CSS class to an HTML Web page to use animated and stationary GIF images as the page's background.

Style the background. If you do not apply a background property to your navigation bar in CSS, it will display with a transparent background by default.