Commissives are a type of speech act where the speaker commits to a certain course of action. This means that when someone makes a promise, vow, or offer, they are using a commissive. For example, if you say, "I will help you with your homework," you are committing to assist someone in the future. These statements are important in communication because they establish trust and expectations between people. When someone makes a commissive, it signals their intention to follow through on their words. This can be seen in everyday situations, like when a friend promises to attend your birthday party or when a business offers a guarantee on a product.