Messaging protocols are standardized methods that allow different systems to communicate with each other. They define the rules for how messages are formatted, transmitted, and received, ensuring that data can be exchanged reliably. Common examples include HTTP for web communication and SMTP for email. These protocols help facilitate interactions between applications, devices, and users, making it easier to share information. By adhering to specific protocols, developers can create software that works seamlessly across various platforms, enhancing connectivity and collaboration in the digital world.