There are plenty of horror stories about outsourced software developers and clients clashing on project requirements, and one of the most common causes of such quarrels is ambiguous language. Vague terms like "urgent," "pending," "ASAP," and so on might mean something different to the client and to the contractor. Or, perhaps, the involved parties have a different impression of the product's prioritized functionalities. It's neither party's fault, per se — they are just speaking different languages, in a sense. The customer has an idea for the product, its functions, and what the user interface might look like.
But the developers are thinking about the "behind-the-scenes" of the project, how to write a scalable and readable code, ensure security, make a solution performant, minimize bugs, etc. When there is a disconnect between both viewpoints, it can lead to extra work, wasted money, stress, and even a sub-par final product. But, thankfully, there's a way to avoid such miscommunications from the get-go: Software Requirements Specifications.