There are different of reasons why people need to use Samsung eng boot or sboot file on their device but most often its used in the process of removing factory reset protection aka frp. i.e., when you flash these files, it helps enable adb mode on the Samsung device then you can now use a tool like miracle box, CM2, etc. to reset the frp lock on the device quickly.
The small file sizes of eng boot and sboot make it preferable to use than Samsung factory binary files for this purpose. Anyway, Whatever you want to use it for you can find the download links below. Enjoy….
How to use the Samsung Eng boot & Sboot files below