New Status Columns
By adding these columns to their keywords reports, advertisers can get a comprehensive snapshot of your keywords’ current scores.
The ability has been introduced where advertisers can view historical Quality Score, and its components, for all of their keywords to understand how they’ve changed over a period of time. This data will be available via four new columns: “Qual. Score (hist.),” “Landing page exper. (hist.),” “Ad relevance (hist.)” and “Exp. CTR (hist.).”
These columns will reflect the last known score for the date range selected by you. If you view Quality Score data for one specific date, the data will reflect what the score was at the end of the day. However, Google has said that historical data won’t be available for dates earlier than January 22, 2016.