To ensure that Campaign Manager 360 serves their creatives to a leading A/V review website, the high-end A/V accessories store needs to download and send placement tags to the specific site.

• They need to upload their A/V accessories-specific creatives into their account.
• They need to select optimal placements on the site for the A/V accessories campaign.
• They need to download and send placement tags to the specific site.
• They need to select the ad sizes for their A/V accessories campaign on the site.

The correct answer is: They need to download and send placement tags to the specific site.

Explanation: To ensure Campaign Manager 360 serves creatives to a specific website, placement tags are essential. These tags are code snippets generated within CM360 for each placement (ad slot) on the A/V review website. The A/V accessories store’s agency needs to download these tags from CM360 and send them to the website’s webmaster. The webmaster then implements these tags on their site. This process allows Campaign Manager 360 to recognize the ad slots and deliver the appropriate creatives when users visit the A/V review website.