The requirements outline the high-level goals that the business wants the application to achieve, but it does not have sufficient details for developers to start implementation straight away. Requirements are imprecise and do not translate well into code, which is very explicit.
Instead, developers need to understand the overall business goal, and the current sets of requirements, and produces a more detailed set of technical specifications. A specification should contain sufficient technical details needed by developers to begin implementation.
In our case, the overall goal of the project is to "Create a web application that allows users to log in and update their profiles."; and the first requirement ...
