RSA Ad Strength & Asset Performance

RESPONSIVE SEARCH AD (RSA) asset report — per HEADLINE and DESCRIPTION: impressions, clicks, cost, conversions, conversion value, cost per conversion, conversion rate and CTR, plus each ad's Ad Strength. This is the evidence for deciding which headlines to keep and which to replace: the one number that decides it is cost per conversion at ASSET level, and it is here.

days = 0 (default) reports LIFETIME figures, which is what you want for a keep-or-drop decision — a headline's whole history, not a slice of it. days=7/14/30 narrows to that window; any other number becomes an explicit date range, and the range actually used comes back as period_from / period_to so two calls can be compared. BEWARE of a short window on a paused campaign: the rows still come back but every metric is zero, which looks like missing data and is really just no traffic. ALSO: Google reports asset IMPRESSIONS from an earlier date than asset clicks and cost, so a lifetime impression count can be much higher than a window that already covers all of the spend — both numbers are right, and CTR is only comparable within the same window. The reply flags this when it sees it.

Rows are sorted by cost, and min_impressions drops assets with too little data to judge. Every matching asset, every asset-to-location association, and every RSA-strength record is retained in the single `rows` collection: `record_type` is `asset`, `asset_location`, or `rsa_ad`. `asset.where_total` gives the association count; matching `asset_location` rows hold each location. `limit` controls only this transport response, and page_token=next_page_token reads the cached continuation without another query or credit. If campaign_id is empty the whole account is covered.

Google's own BEST / GOOD / LOW grades are included when they exist, but in most accounts they DON'T: Google grades an asset only when the ad group has enough competing assets and enough traffic, and otherwise reports NOT_APPLICABLE. The reply states how many fall in each grade, so an empty grade list is not a broken report. Read-only.