Migration Compare

Open any property, expand SITE ANALYSIS in the left menu (it starts collapsed) and click Migration Compare. Outside a property it sits in the main menu under My Sites and Global Reports, and the direct address is tool.gscwizard.com/migration. The report is not tied to the property you came from: you pick both sides in the setup.

Under Compare, pick the mode, then the old and the new side. Set the Go-live date to the first day the new setup was live, usually the day the redirects went on. Windows and Window length decide which days are compared: the default, Most recent data (recommended) over 28 days, answers “where do we stand now”. The line under the dates previews both windows and explains any compromise, such as windows shortened because the migration is only a few weeks old. Fill in Name (used when saving) if you plan to keep the setup. Details in Windows and baselines.

Open Redirect mappings under the setup and drop in a CSV with the old URL and the new URL of every page that moved. With a map, every old page is compared with its own new page, merged and split pages are judged as one move, and every redirect can be checked. Then click Verify redirects: GSC Wizard requests each old URL, follows its redirects and records where it lands. Without a map the analysis still runs, joining old and new pages that share a path. Details in Redirect maps and verification.

Nothing is fetched until you click Run analysis, so opening the page or a saved migration reads no data. A progress list shows each read while it runs. Properties synced to the warehouse in Dashboard Management are read from there; others are read from the Search Console API. After you change the setup the button reads Run analysis again. Two settings apply instantly, without a new run: Strict URL matching and Section depth.

The Migration health banner gives the verdict in one sentence, with a status of Healthy, Recovering, At risk, Critical or Insufficient data, and recovery, pace, momentum, the risk score and URL success next to it. Further down the Overview tab, Recommendations lists what to fix first; click one to jump to the rows behind it. Anything that limits the data, such as a short window or a read that hit its row limit, is listed under Analysis warnings above the results. The seven tabs are covered in Reading the results.

Click Save, next to the Saved migrations menu at the top right. A saved migration keeps the whole setup, and its go-live date is added as an annotation to the properties you can edit. Then open Filters and matching, tick Alerts and click Save changes. A daily re-check then verifies the redirects again and posts to Slack, Microsoft Teams or a webhook when new redirect problems appear, or when recovery stalls or drops. Details in Saving, sharing and alerts.