Modify column Vs change column

Question

I know, we can not rename a column using modify column syntax,but can change column syntax.

My question is: what is the main usage of

Answer 1

I found one difference after more than an hour of effort in trying to make a non auto_increment column into auto_increment statement: alter table doctor_experience modify column id int(11) unsigned auto_increment works, but statment: alter table doctor_experience change column id id int(11) unsigned auto_increment will report an error.