Watch out for impression count implications

If you update the copy in your AdWords ads they will be excluded from syndication to non Google sites until they have been reviewed - a process that can take a day or two.

Therefore, if you make changes you will probably see a drop in impression count if you have selected content-targeting as a campaign level option.

To work round this you need to add the new ads into your AdGroups so that the old ones continue to run. Once the new ones have been live for a few days you can then disable/delete the old ads without losing exposure.

William Charlwood
AdWordsManagement.com