Why do we need alignment of (assembler) code when compiling (linking)?

Question

assembler

Here I wrote some code, in C's for example. I fed it to the compiler, got a binary (executable). Why does the compiler (or maybe the linker) add NOPs after functions so that functions start from addresses that are multiples of some number?
I understand that you can store data on hard drives this way, round to sectors, tracks, or something like that, but in RAM, access to any section takes the same amount of time, so I don’t understand the point of rounding function addresses.

Answer 1

Why alignment of (assembler) code is needed

Because it requires less cache and works faster.
Also, on some architectures, some branch instructions can only branch to aligned addresses.
No.