While the importance of your project may seem obvious to you, this is not always the case for the donor. Proposal writers often get caught up in the details and numbers of their project and forget the overarching reason for the project to exist. Do not make this mistake in your concept note.
Donors receive hundreds if not thousands of proposals, and they want to read applications that are important and clearly show the problem they are solving. Take this time to explain to the donor how you will impact the lives of your beneficiaries, and what the costs will be if the project does not take place. It is useful here to combine personal stories of the community members you hope to help as well as relevant statistics to show the scale of the problem.
This section of the concept note does not have to be long, but it does have to be clear and engaging. Even a single well-written sentence that clearly proves the necessity of your project can place you above your peers in the application process.