There are a few ways to remove the white background in Illustrator. One way is to use the Eraser tool. You can first select the white area you want to erase, and then use the Eraser tool to remove the white background. Another way to remove the white background is to use the Brush tool and the Overlay mode.
PRO TIP: If you are working in Adobe Illustrator, there is a setting that allows you to change the background color of your document. To access this setting, go to File > Document Settings. In the dialog box that appears, go to the ‘General’ tab and look for the ‘Background Color’ option. By default, the background color is set to white, but you can change it to any color you like. Keep in mind that changing the background color will also change the color of any objects that are currently set to white.
To do this, first select the white area you want to erase, and then use the Brush tool to paint over the white area. Finally, use the Overlay mode to erase the white background.