What's the Difference between 32 & 64 bit OS ?

We all have seen 32-bit and 64-bit options available whenever we download an app, or install a game.Even when we see our computer property it shows that OS is 32 bit or 64 bit.

Now what this 32 bit and 64 bit  is?

Applications with high performance demands take advantage of The terms 32-bit and 64-bit refer to the way a computer's processor.The 64-bit version of Windows handles large amounts of random access memory (RAM) more effectively than a 32-bit.

64 bit versions of OS especially useful in programs that store a lot of information for immediate access like editing software that opens multiple large files at the same time.

What are bits?

The numbers of bit's in a processor refers to the size of the data types that it handles and the size of its registry.

And system32-bit number has 2^32 possible addresses, or 4,294,967,296. Conversely, a 64-bit number’s capacity is 2^64, or 18,446,744,073,709,551,616. Comparing ~4 billion bytes (about 4 gigabytes) to ~18 Quintilian bytes (about 18 billion gigabytes).