Hi Aspirant

Since you have not specified any particular competitive examination or college or counseling I will write what generally happens in most of the counseling processes.

If you don not freeze the seat that you are allotted in a particular round, you will get a seat higher in your choice list in the subsequent rounds or you get the same seat.

Please note that this is on the basis of JOSAA counseling.

For any specific examination you can mention the details in the comments section below and I will try to help you out with it.