A01 chaf6542 06 se fm indd

CPM  ( cost-  per- 

  thousand)

The cost to the advertiser 

(or the revenue received 

by the publisher) when an 

ad is served 1,000 times.

CPC  ( cost-  per-  click)

The cost to the advertiser 

(or the revenue received 

by the publisher) of each 

click of a link to a  third‑ 

 party  site.

CPA  ( cost-  per- 

 acquisition)

The cost to the advertiser 

(or the revenue received 

by the publisher) for each 

outcome such as a lead 

or sale generated after a 

click to a  third‑  party site.

Digital rights 

management (DRM)

The use of different 

technologies to protect 

the distribution of digital 

services or content such 

as software, music, 

movies or other digital 

data.

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Part 1  Introduction