Explain the importance of computer architecture

Studying the architecture implies working on machine language programs. However, this isn't practical when we design a computer as machine language programs have 1s and 0s. Consequently we will work on mnemonic machine language programs. They are easier to write and in one-to-one correspondence with machine language programs. That is, if one has a mnemonic machine language program, it's very straightforward to obtain the corresponding machine language program. Note that there is often no one-to-one correspondence between assembly language programs and machine language programs.