When and where one advertiser appeared, with the observation schedule

Returns one advertiser domain's history on the project's monitored searches in the window and filters: presence (checks with the advertiser / checks), first and last seen, active local days, the observation schedule (project frequency, checks, days with checks, longest wait between checks), weekly presence by local week, breakdowns by keyword, location, device and engine with the change between the two halves of the window, and returns (reappearances more than gap_days after the previous one, with checks in between that did not show it). Use the breakdowns to locate where an advertiser recurs and the returns section to review reappearances. Check the schedule and days with checks before treating a presence change as a trend; the rate describes saved checks, not all searches in the market. A change is null when either half has no checks. presence_rate = checks_with_advertiser / checks over saved monitoring checks, the same calculation as visibility in list_advertisers. It describes this sample, not impression share, spend, or proof that a keyword was bought. Hours or days without checks are not evidence of absence. Breakdown lists hold the 50 busiest rows each; *_total gives the full count. Imported studies are not included.