There are a number of things we learn from such young age that we forget we are even doing like leaving spaces. DoIreallyneedtoleavespaceswhenwriting? The way I have written this proves my point. The question reads “Do I really need to leave spaces when writing?”. It was actually easier for me to write with spaces than without. We must leave spaces to insure that writing is legible.
Punctuation is also very important for legibility. With punctuation we are able to show the end of a sentence with a full stop, or to show a question with a question mark. Punctuation is also important to show speech, lists, extra information and many other things.