How does a project charter support the project manager in getting things for the project from other people?

A project charter contains:

Project manager assigned, his responsibility and authorization level. Project Objectives Project justification. Project general description. High level requirements High level risks. Summary of the most important milestones in the schedule. Budget Summary List of Stakeholders or stakeholders of the Project. Requirements for project approval. Name and level of authorization of the Sponsor or the person authorizing the Project Charter.

The important thing with the generation of this document is that there is a formal record of the initiation, limits and completion of the project being of great importance for its success.

In this way, with all this information established with security, it allows the manager to obtain funds from third parties for the realization of the project.