You can set up your targetable custom channels (or ad placements) by selecting the 'Allow advertisers to target this channel' checkbox on the channel creation page to enable advertisers target their content to your audience directly on a CPM or CPC basis.
In addition to AdWords advertisers, these campaigns also makes your content available to Google's internal sales teams, who work closely with many advertisers looking to target a certain audience or type of content. Here’re few tips for publishers that’ll help advertisers and Google internal sales teams target your content to help you maximize revenue:
- First, make sure your channel names and descriptions accurately describe your content and audience’ll attract advertisers from those areas.
- Be very careful about changing the name of an ad placement. If an advertiser has already targeted one of your specific channels, the channel will become unavailable to them. If you wish to rename a channel, it’s recommend creating a second channel with the new name, and then attaching both channels to your ad unit.
- Use the 300x250 medium rectangle, opted in to both text and image ads units in line with your content, and describing them as they relate to the content.