An impression (in the context of on-line advertising) is when an ad is fetched from its source, and is countable. Each time an ad is fetched it is counted as one impression
About Owen Gallagher
Owen Gallagher is an experienced insurance litigator as well as a certified mediator and arbitrator who specializes in insurance industry disputes. His interest and affinity for insurance began at a young age working the counter at his father’s assigned risk agency in Roxbury. Over the course of his career, Owen has argued a number of cases in the Massachusetts Supreme Judicial Court and has helped agents, insurance companies, and lawmakers alike with the complexities and idiosyncrasies of insurance law in the Commonwealth. Owen can be reached here.