Need help with Domain Terminology...RPM, CTR, RPC...

[abucan]

Hi,

Can anyone point me to info on what RPM, CTR, RPC and all these abbreviations mean and how all that translates into traffic/income? I checked my stats today and got RPM of $154 (all from one site) but the grand total at the bottom for that portfolio was $55. Same with my CTR. Was 16% but grand total 5% and then there is revenue of $1. So what did I earn and how did it get from $154 to $1 ???

As u can see, I'm super new to this and would appreciate any kind of help! Thanks.

 

[P10n33R]

RPM: Revenue Per Mil representing advertising income per thousand page impressions.
CTR: Click-through rate, a measure of the success of an online advertising campaign.
RPC: Revenue per Click