Sections should be dense with information, but short.
In today's digital era, readers expect a style of writing that presents a complete unit of information within a short block of text. Whether that person is reading a book, web page, or a resume—most likely, they would lose interest once they reach a fifth line of text without receiving a self-contained message to take from it. To get around this problem, keep each paragraph and section of your CV short, but substantive. Break down complex parts into smaller, bite-sized pieces that are easier to understand for your potential employer.