If you want to remove the white background from your Illustrator file, you can follow these steps:
Open your Illustrator file in which you want to remove the white background.
Select the object or objects you want to change the background of.
Select the “Background” tab in the “Object” panel.
Select “Copy Background.”
Go to the “Backgrounds” panel and select the “New Background” button.
PRO TIP: If you are trying to remove the white background in Illustrator, be aware that this can unintentionally result in losing some of the image’s original quality.
Select the “Paste Background” button.
Select the white area of your Illustrator file as the “Source” and the background you copied in step 2 as the ” Destination.”
Select the “OK” button.
Your Illustrator file will now have a white background.