Because position on its own is a vanity number. A page moving from nine to six looks like progress and may change nothing if a snippet is taking the clicks.
Keyword tracking follows position over time for the queries in your clusters, alongside their impressions and clicks.
Positions come from search data rather than scraping, are aggregated by cluster, and are always presented with impressions and clicks for the same period.
A cluster improves from position eight to five while clicks fall. That is visible as a problem — the intent has shifted or the result is being answered on the page — rather than reported as a win.
It will not promise stable measurement. Positions vary by device, location and personalisation, so Growth reports trend rather than a precise daily figure.
The cluster, its target page record, and the click curve your own pages produce at each position.
Daily where the data allows, reported as a trend.
Yes, per market, as separate series.
Where the data shows them, yes, since they explain click gaps.
Fourteen days, every module, no card. Or half an hour with someone who will run it on your own records and tell you where it does not help.