From Adsense blog: Two weeks ago, we gave you a sneak peek of what was in store for November. Now, we’re happy to let you know that we’ve started rolling out our new ad management feature to publishers! As a reminder, this feature will save the settings of your ad units within your AdSense account. That means, each time you want to change the colors, channels, or even the corner styles for your ad units, you can make the changes directly in your account rather than generating and pasting new code. Again, we’re still working on rolling this feature out to all publishers, so don’t worry if you don’t see it in your account yet — it’ll be there soon.
Below are a few answers to questions you might have about this new feature:
How has the process of generating new ad code changed?
On the ‘Get Ads’ page of the ‘AdSense Setup’ tab, you’ll find the same code generation wizard you’ve used before. At the end of the wizard, you’ll now be prompted to provide a name for the ad unit you’ve just created. We recommend using a descriptive name so that you’ll remember where you pasted this ad unit. For instance, use names like “Homepage Leaderboard, example.com” or “Top 300×250, Sports pages.” You can find more detailed instructions in our Help Center.
Why do I need to name my new ad units now?
With this new feature, all your new ad code will have a name and an unique ad slot ID. This will help you remember them so you can make changes to them later directly on the ‘Manage Ads’ page. As noted above, please be as specific as possible when naming your ad units and include information such as location, ad size, and domain.
Will the old ad code on my sites still work?
Any ad code you’ve generated in the past will continue to work as normal. However, please note that the old ad code will not automatically be updated to include this feature. If you’d like to apply this new feature to your old ad units, you can import the code and save the new settings.
Why don’t I see anything after adding a new ad unit to my site?
If you’re implementing a newly created ad unit on your site, the ad unit may not appear for up to 10 minutes while our servers are informed about the settings for the new unit. Don’t feel like waiting? Simply use the Preview function on the ‘Manage Ads’ page to check out your updated pages immediately.