Open the Google Photos app or go to photos.google.com
Sign in to your Google account
Select the photo or photos you want to remove
Tap or click the trash can icon
Confirm the deletion
To delete multiple photos, press and hold one photo, then select others
To delete all photos in an album, open the album and select the photos manually
To remove photos from a device only, use the delete option on that device
To delete photos permanently, go to the Trash or Bin
Open Trash or Bin
Select the photos you want to delete permanently
Tap or click Delete forever
To restore deleted photos, open Trash or Bin and choose Restore