The useful addition will let advertisers control the time aggregation on AdWords charts in order to show the data on daily, weekly, monthly, or quarterly basis. This will enable the advertisers to see the trends clearer instead of just looking at the data by day.
"Today, we’re making it easier and faster to get a customized view of how your performance is trending with a new button right above your chart in AdWords that lets you toggle between Daily, Weekly, Monthly, or Quarterly data (shown below). We hope this will save you time and make you more efficient while optimizing your search campaigns".
Here's the image of the options available:
The before and after picture:Google Adds Time Aggregation Feature to Charts in AdWords!,