What is MARS actual means ?

Hi Experts,

What is actually meant by Multiple Active Result Sets (MARS) in SQL Server? Can anyone give an example. I always get confused with this term.

Is below tsql block can be considered as MARS ?

select * from T1;   --result set 1
select * from T2;   --result set 2
select * from T3;   --result set 3


Thanks,
Sam