Capitalization and punctuation marks are both important to create a sentence. If improper use of these occurs, there would be a problem in writing and reading. For instance, we cannot start a sentence with a small letter because it will be an error and it should always start in capital letter. However in reading, punctuation marks have significant use. If a sentence ends with a period, the reader will stop, if it has exclamation point the reader will rise the tone of the end part of the sentence, and if its a question mark, the tone must be like asking a question but if those punctuation marks are not indicated it will be confusing.