Here are some of the changes that puted:
Simplified navigation: More easily navigate to the right content using the new menu at the top of each page.
Visible contact options: Find options to reach Google with a click on the "Contact us" button in the top right of any page.
More screenshots and videos: Use the screenshots and videos in many of the articles to quickly learn how to make the most of Google AdWords.
To opt into the new Help Center, select “Try the new look” from the yellow bar at the top of the page.
You can also opt out at any time by selecting “Go back to the old look” in the bottom right corner.
Now rolling the changes out gradually, starting with about 60 of the most important topics. Stay tuned for more updates, as well as the global roll out, over the new few quarters.
Do you like the new Help Center? We'd like to hear what you think. Once you've opted-in to the new Help Center, just click the "Send Feedback" link in the lower right corner of any Help Center page.
You can also follow a thread in the Forum if you have something to share with the users in the AdWords Community.