Hey Ashish,

In most of the counselling generally three option have to see.

1. Float: suppose you have alloted a seat and you want to go for further round of the counselling with securing this seat. In it your college or seat may change.

2.Slide: This is same as float but the college will same only your branch will change.

3.Freeze: it means you are happy with your alloted seat and you don't want to go for further round.

Hope this helps you!