Protocols, design conventions, and software are important aspects of web authoring to understand. Protocols are the rules that govern how data and information are exchanged over the internet, such as URLs, domain names, and hosting. Design conventions provide guidelines for visually appealing and usable web design. Key conventions discussed include the rule of thirds for layout, color schemes like monochromatic and analogous, and font size and type for readability. Formatting with paragraphs also helps organize long texts and make websites more professional.