Dear Student ,

All India Counselling means , the counselling process based on the All India rank.An all India Rank is a combined rank of Unreserved and reserved category .

Well, you have not told your preferred exam name .. but as per your user  details.. I think you are asking about NEET exam All india Counselling.

The All india seats are mainly available 15% after the remaining 85% of state quota seats ..through AIQ , the students can get admission Govt as well as medical colleges based on their marks as well as the seat matrix of the institutes.

To know more about all India counselling in neat , refer this :

https://medicine.careers360.com/articles/neet-counselling-faqs

Hope this helps !