Change of address through Google Search Console

When a website decides to change its domain, the most nerve-wracking part is undoubtedly the waiting game for search engine re-indexing. Our journey of migrating from a.com to b.com can be clearly divided into three stages, each with its own unique signals and challenges.

Stage 1: Signal Confirmation (Weeks 1-2)
This is the starting line. The core objective here is to clearly send the "change of address" signal to Google.
Core Indicators: Googlebot begins crawling the old domain frequently. You will notice the number of indexed pages for the old domain starts to drop significantly. Meanwhile, the index count for the new domain, b.com, begins to grow rapidly.
What You'll See: It is normal to see pages from both the old and new domains appearing in search results simultaneously. This isn't an error; it simply means Google is in the process of identifying and processing the 301 redirects.
Mindset: This phase is mostly backend crawler work. Direct traffic usually remains stable, so there is no need for excessive anxiety.

Stage 2: Authority Transfer (Weeks 3-8)
This is the critical window that determines the success or failure of the migration. Google's algorithms begin the large-scale process of transferring ranking history and authority.
Core Indicators: Old URLs in search results are massively replaced by the new ones. Google starts gradually transferring the ranking power (authority) from a.com to b.com.
What You'll See: You might experience slight traffic fluctuations. Clicks on the old site will decline accordingly, while clicks on the new site will steadily rise. In Google Search Console (GSC), you will clearly observe the Impressions for the new domain continuously increasing.
Mindset: This is the "growing pain" period of authority transfer. The ebb and flow of traffic is normal, so patience is key.

Stage 3: Stabilization (Months 3-6)
After the transfer of authority and re-evaluation, the website enters a new stable state.
Core Indicators: The vast majority of search traffic has successfully migrated to the new domain, b.com. The old domain will become almost invisible in search results, except for some residual backlinks that haven't been updated.
What You'll See: Search rankings for the new domain stabilize. If the migration was executed correctly, the new domain's overall performance should match or even slightly surpass that of the old domain.
Mindset: The migration is essentially complete. You can now shift your focus to the long-term operation of the new site.

3 Key Variables Affecting Migration Speed
The migration process is not set in stone. Its speed is influenced by the following three core factors:

Site Scale
The number of pages directly determines how long it takes Google to process all the 301 mappings. A small site with 100 pages might be processed within 2 weeks, whereas a large site with 10,000 pages could take several months.
Quality of Backlinks
External links pointing to your old domain are a crucial source of authority. If external sites proactively update their links to the new domain, the transfer of authority will be extremely fast. Conversely, if you rely entirely on Googlebot to discover the 301 redirects on its own, the process will be relatively slower.
Crawl Budget
Your website's crawl budget—the frequency and efficiency with which Googlebot crawls your pages—is also vital. The higher your site's update frequency and the faster your server response time, the higher Googlebot's crawling efficiency will be, naturally speeding up the entire migration process.