The financial services industry accounted for the most online image-based ad impressions in July, with nearly 36 billion. Next were Web media and telecommunications, followed by retail goods and services, according to Nielsen data.

Download the Excel file of the above data.

Note: The Nielsen AdRelevance service uses a proprietary methodology for estimating online advertising expenditures and takes into account only image-based technologies and advertising sold per CPM. Above data does not reflect house advertising activity, strategic partnerships between publishers and advertisers, or text units, compound image/text ads, paid search, sponsorships, email, units contained within applications (e.g., messengers and pre-rolls), or performance-based advertising.