Keyword substitution?

Hi, I know there is a way to specify in adwords keyword substituion, so you can create one ad for:

xx widget

and then dynamically substitute blue, green, yellow for 'xx'.

I searched google help, searched google itself, and could not find the answer. Please help.

 

This should help, Google AdWords dynamic keyword insertion.

 

Thanks, Kevin. Funny how difficult it is to find things, if you don't know what the exact term is, in this case 'dynamic keyword substituion'.

 

Yeah definitely, you'll probably find all the information about AdWords you don't want to know first!