Computers are basically built from the ground up to understand binary.
It’s helpful if you think of binary, not as 1’s and 0’s, but ON or OFF. When you’re designing a computer, you’ll have different wires and lines connecting different pieces and depending on whether or not the wire has electricity running down it will affect what the computer is doing. So the hardware is built to say “if the electricity is on for this line, then I’ll do this, but if it’s off, then I’ll do this other thing or do nothing”. When you have a program written in binary, it will be turning these signals on or off depending on what it needs to do.
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