How do John Searle’s Network and Background help speech acts succeed?

According to John Searle, speech acts do not function in isolation; rather, their success depends on being embedded within a broader cognitive and practical framework.1

The Network and Background are essential for serving the illocutionary point of an utterance:

• The Network: This consists of a web of unarticulated beliefs and other mental states. For a speech act to be understood or fulfilled, the speaker and hearer must rely on these interconnected assumptions. For example, the promise "I’ll buy you dinner" presupposes that the speaker understands what dinner, money, and restaurants are.1
• The Background: This refers to a set of non-representational capacities or "know-how." It includes the practical knowledge of how to conduct oneself in the world—such as how to eat, drink, or navigate social environments—which are necessary for the successful execution and interpretation of speech acts.1

Without this underlying structure of beliefs and capacities, the specific illocutionary force of an utterance would fail to connect with the world or the hearer in the intended way.1