CPM and ECPM?

My native language isn't English.. so I really need an explanation..

[I Will Make It]

Cost-per-thousand-impressions (CPM)

The CPM is the amount an advertiser pays for every 1000 times a user views his/her ad and an impression is recorded.

How are these stats useful for us, who shows the advertisers ads? Can I please get an explanation from one of you guys?

And also, is ECPM the same as CPM?

[Hobbs]

It's all here:

What are CPM ads?
[google.com...]

What is Effective CPM?
[google.com...]

[I Will Make It]

AHA! thank you so much. I wonder why I couldn't find these pages before ;)

Anyway, thanks a lot!

[AdSenseAdvisor]

Also, beyond definitions, this is my favorite explanation of how eCPM is useful for publishers:

[adsense.blogspot.com...]

You can use this statistic to run experiments on your site and maximize your revenue potential.

-ASA

[I Will Make It]

A big thank you to you too :)

Very nice explanation.
It's so much easier living in this world, when people are helping each other out! WW.com is just perfect :D