Hello, Kindly specify about what application process is your query about so that we can help you further. A sponsored candidate is the one who have been working in an organization and they have allowed the candidate to study further. Consider it as a paid leave for educational purposes. Currently sponsored program is prevalent in top institutions like IIT,IIM. You can check out this link to know about the sponsored candidate admission in IIT https://www.iitk.ac.in/spgc/cand/2.htm

Hope this helps.