Flash Fill can be used to enhance your photos to get rid of shadows. I did this on this Halloween display on the front porch. Look at the flash filled photo verses the one below especially in the straw bundles.
You can see the difference the flash made in the photo.
I did some flash fill the night before on the display.
You can see even with the night setting the flash fill changed the results.
Here is the same photo from the front at night.
Since I was shooting against some window light the camera didn't want to pick up the object.
We went to our favorite place for a Tuesday supper, Ray's Place. My granddaughter gave a big smile. The flash doesn't reach the back wall so it didn't come out as well.
Without the flash fill the photo was washed out without much definition.
See what the others show on my side bar.