To make sure that Campaign Manager 360 serves the tennis shoe creatives to a top sports site, you need to download and send the tennis shoe placement tags to the specific publisher.

• Upload creatives that are specific to tennis shoes to your account.
• Choose optimal placements on the publisher for the tennis shoe campaign.
• Select the ad sizes for the tennis shoe campaign on the publisher.
• Download and send tennis shoe placement tags to the specific publisher.

The correct answer is: Download and send tennis shoe placement tags to the specific publisher.

Explanation: To ensure your tennis shoe campaign creatives are served on the top sports site via Campaign Manager 360, you must implement placement tags. These tags are unique code snippets generated within CM360 for each ad slot you’ve secured on the sports site. You need to download these specific tennis shoe placement tags from Campaign Manager 360 and send them to the sports site’s web team (the publisher). They will then embed these tags into their website’s code. This integration is crucial for Campaign Manager 360 to recognize the ad spaces and deliver your tennis shoe creatives when users visit the sports site.