Suspending impressions for a specific keyword
You can suspend the display of ad group for a specific keyword. In this case, the statistics collected for this keywork will be saved.
You can stop impressions for a specific keyword on your campaign page in the keyword editing section:
You can also suspend any active phrases. After suspension, the phrase will be highlighted in pale blue.
Statistics (accumulated CTR) for stopped keywords will be stored for 28 calendar days starting from the moment they are stopped; after that they will be reset to zero. However, the phrase can be enabled after this time has elapsed.