A charity foundation is a nonprofit established to mitigate a social issue. They're organisations with a social mission, raising funds to combat prevailing social issues.
Helpster is an example, as we're solving the problem of limited healthcare for the underprivileged.
Charity foundations focus on an issue. It could be environmental pollution, poverty, hunger, limited medicare access, etc. They develop programmes to reduce these systemic issues, fostering sustainable impact in their communities.
Beyond charitable giving, these foundations also do advocacy to draw attention to issues and cause the desired change.