Codeigniter download install web vs Composer

Ouh!

Thank you ciadmin for such prompt and fast reply!!!

I got it

I kindly take advantage of your knowledge (if you allow)

The content of the vendors subdir ... who is supposed to use/take advantage of the vendors subdir content?

(I'm sorry to ask, but because of leak of time, I'm still in a learning stage about PHP-OOP, codeigniter and recently composer)

but more and for the sake of other newbies learning ... e.g. should anybody run "composer updated" and HAVE that vendors folder? Maybe for security purpose or whatever

or

that is optional and those are just more libraries and helpers for advanced developers?

Thank you for teaching