Hi Nihal

It means candidate's wish to accept the seat allotted to him or her.

If the candidate is satisfied with the allotted seat then he or she can show their willingness for the same. If not, candidate can opt for upgradation of seat and wait for the next allotment.

Willingness status includes Freeze, Float and Slide options. 

When a seat is allotted to a candidate, he or she is bound to choose any one of the above mentioned options.

If you are satisfied with the allotted seat, freeze it.

If you are not satisfied with the seat allotted and want to upgrade it in some other programme and participating institute, you will have to float it.

If you are not satisfied with the seat allotted and want to upgrade it in the same institute for a different branch, you will have to slide it.

Hope this helps.

All the best !