Solution
Nothing changed.
You are still losing.
Your rankings held. Your bids held. Your traffic did not. Something moved on the result page and no metric you own is built to show it.
You notice it like this
- Traffic is down with no ranking change and no budget change.
- Impression share looks healthy, which makes the drop harder to explain, not easier.
- You suspect a new entrant but cannot prove when they arrived.
Why it happens
Rank is a position in a list; it is not a size. A new ad, a taller Overview or a shopping row can take half your screen without moving you a single position. Measured in pixels rather than positions, the day it happened is obvious.
What Marley does about it
3 capabilitiesWhat you see
Share of Screen · trendus-en · desktop
a competitor entered the top ad slot on day 19 — rank never moved