Delhi University reserves a few seats(about 5% in every college) for students who have indulged in Extracurricular Activities (ECA) during their school education. Candidates who are applying through this category can expect marks relaxation of up to 15% (for unreserved candidates) in merit lists. 

For example- If the closing cutoff for English Hons.for a particular college is 90% (for unreserved categories),  then a student from ECA quota,  with required skills and certificates,  can get admission at less than 90%in the same course and college. 

Hope,  it would help