I created a new ad and then added specific channels to the ad, but when I put the code on my site, it doesn't target any of the keywords/channels I specified. Anyone know why? Also, can a channel keyword have spaces?
How long have the ads been up? If only a couple minutes, give them a day. If that doesn't work, use section targeting and/or add a little bit more keywords in your page. And yes, a channel name can have spaces (if that's what you're asking).