Why we use materilzed view

Hi All
Can you tell me that why we use materlized view instead of Views.
I know that in Mat View data is populated at the time of creation as not in case of View.
Then what is the use of Mat view?

regards
praveen

I can think of three reasons, there may be more ...

i) For replication, where we want to keep one database's data aligned with another

ii) To provide a consistent view, by updating an MV at fixed intervals, like once a day.

iii) To provide fast access to precomputed aggrege data.

I expect other people can think of other reasons.