Return on investment (ROI) information can help you manage a client’s campaign by helping you determine how to:
adjust your client’s budget
optimize your client’s keywords
optimize your client’s ad text
All of the listed answers are correct
Yes, it’s a correct answer in this test. About ROI: Whether you use AdWords to increase sales, generate leads, or drive other valuable customer activity, it’s a good idea to measure your return on investment (ROI). Knowing your ROI helps you evaluate whether the money you’re spending on AdWords advertising is going to a good cause: healthy profits for your business.
ROI doesn’t help to optimize ad Text. Not directly. Same with Keywords. “Adjust your client’s budget” is more logical answer as it’s directly concerned.