One advertiser's distinct ad copy, newest first

Lists the distinct ad copy versions (headline, description and display URL, with spacing and URL spelling differences ignored) one advertiser showed on the project's monitored searches in the window, newest first observed version first. Each version has its first and last seen time, ad occurrences in the window, keywords, and, when it replaced an earlier version, previous_version_id and a word-level diff. Use the diff to brief the SEM team on messaging changes seen in the monitored results. Observed creative changes do not show which version performed better; the tool measures what appeared in saved checks, not clicks or conversions. first_seen is when monitoring first observed the copy, not when the advertiser launched it. To tell a new version from an old one, up to 90 days before the window are also read. A copy change is not evidence of a policy issue.