Google announced on Monday that it is rolling out a new AdWords feature that lets advertisers compare metrics across different time periods by putting data into AdWords tables.
The new feature comes in the form of expandable columns, available when advertisers have "compare dates" enabled in their date selectors. There will be a new + button at the top of some columns, and when clicked it will expand to show you the data for the appropriate column for the week.
"Click the + above Clicks, for example, and the Clicks column expands to show you this week’s Clicks, last week’s Clicks, the absolute change and the percent change," explains AdWords product manager David Rodriguez.
The feature is being added to a variety of reports on most metrics. The columns can be sorted and filtered.
This makes it easy, for example, to create a saved filter which finds all campaigns that saw a decrease in clicks of 20% or more," says Rodriguez.
The feature is rolling out over the course of the next few days, so if you don't immediately see it, sit tight.