Dear Student,

so general essentially is the rank you have obtained among all the candidates who have appeared for the exam whereas community rank is the rank you have obtained among all the candidates who have appeared for the exam among your community.

When it comes to the usage of these ranks , the usage of community rank is that it decreases your general rank by a certain range so that you are able to get a good college rather than a low rated college with your general rank. Community rank is similar to a reservation. Such reservations are present in all colleges. This what sometimes makes it difficult for general rank students to get good colleges.