Answer:
process of evaluating and analyzing the total changes in sales with regards to the product and/or service that has been advertised
Step-by-step explanation:
In this scenario it can be said that the most likely activity that the advertiser is engaging is would be the process of evaluating and analyzing the total changes in sales with regards to the product and/or service that has been advertised. This is because the main goal of an advertisement is to bring more awareness towards the product/service in order to increase sales. Therefore if sales increase after the advertisement is posted then it can be considered a success.