Counselling of MBBS basically means a set of procedure through which candidates get their colleges based on their ranks.
It includes - document verification , choice filling of your colleges, allotment, and upgradation-(in 2nd round of counselling if seats remain vacant).Only those candidates who managed to clarify the cut-off of their category are able to participate for counselling session.

Currently there are 2 types of counselling fees-
refundable tuition fees
Non refundable registration fees

for more information please refer to https://medicine.careers360.com/articles/neet-counselling