A map projection is used to portray all or part of the round Earth on a flat surface. This cannot be done without some distortion. Every projection has its own set of advantages and disadvantages. There is no "best" projection. The mapmaker must select the one best suited to the needs, reducing distortion of the most important features.
Cutouts is an open source application. Code licensed under the MIT license. Copyright 2018 Siddharth Kannan