Netiquette actually means "Internet etiquette." Just like etiquette is a code of polite behavior in society, netiquette is a code of good behavior on the Internet. This includes several aspects of the Internet, such as email, sending memos, or basic communication regarding office task.
Now we should note that communication is not just a pivotal part of any organization, it is an integral part of any organization, without communication, an organization will suffer greatly. Communication is said to be effective when the receiver understands the message conveyed just as the sender wanted to, having said that Netiquette improves efficiency and productivity in the workplace because it creates an avenue for efficient communication which includes clear instructions, fast message delivery, and proper explanation, and this bridges the gap between managers and employees even when they are miles apart. A clear message about a task makes it easier to carry out the said task, thereby resulting in high productivity in the workplace.
This is a little tricky. I would say reserve. It would help to know what programming language and class this is for because a lot of times when you create an array variable the memory is put onto the stack and you as the programmer do not reserve memory space. Now on the other hand, if you are programming in C and you want to create an array variable and put it on the heap then you would reserve memory space on the heap.