There is where the information for the project is located. Whitepaper is a plan for a project and you can read whether it will become successful in the future. You can read there mission and vision of the team why they are developing such project as well as the allocation of funds. Well whitepaper is a good source when doing your on research about the platform itself before you do some investment but be careful because some new project or ICO's are copying whitepapers from other