What is the vertical bar in UNIX Shell for?

Question

Command line

What is the pipe character used for in a UNIX shell? I come across examples like
nasm -s -f obj myfile.asm | more,
fetching search results, (launching several programs in a row?) and other situations. Maybe it is googled, but I can only find about bitwise OR. I know this, but this is not an exhaustive answer, so please list the use cases with examples.

Answer 1

It's a pipeline - output redirection.
That is, the result of the output of one command is passed to the input of another command.
In this situation, more is a program that outputs text page by page. It would be possible to feed the file to her, but here the output of the nasm -s -f obj myfile.asm command is fed, which apparently takes up several pages.
Read more about I/O redirects on Google.