Hi,

Is there a document which tells the detail rule when a keyword's ID will be changed if I update some properties of this keyword in google adwords editor?

for example, If I change its maxCPC, it will not affect the keyword ID. I can use CriteriaService.updateCriteria to update that

But if I change keyword Text or MatchType, CriteriaService.UpdateCriteria will not do anything. I must delete the keyword first then create a new keyword with that text/matchType.

I want to know the detail rule which adwords editor does, how it decides it is just a simple update, or it should delete/create the keyword?

thanks