Can somebody help me know what the file is in the iphone software update folder in Windows 10

I am a little confused about this. Can somebody help me understand? the file there is about 7 GB and the title of the file also has in the name "Restore" and is an ipsw file. It is in the Appdata folder in the apple computer directory.

I am wondering if this is simply the download of the iOS update to my system and if i can delete it. I have a backup of my phone in another directory.