In a website redesign, the issue most often underestimated is neither design nor front-end implementation, but how to handle old URLs. At the beginning of many projects, meetings focus on sections, templates, and interactions. Only after the new site goes live and traffic drops do teams discover that old pages were not redirected, were redirected incorrectly, or that entire batches of historical content were “consumed” by the new structure. For a 301 weiterleitungen relaunch, the key is not to redirect old URLs to the new site arbitrarily, but to migrate as much as possible of the page equity already recognized by search engines.
Project managers should first focus on three outcomes: whether each old URL can be matched to a corresponding new URL; whether the authority of high-value pages has been diluted; and whether crawling, indexing, and conversion paths remain intact after the redesign. If these three areas are not properly managed, even an attractive new site may first deliver an unattractive traffic report.
Many teams export an old sitemap and immediately start creating a redirect table. This is usually not enough. A sitemap only shows the pages the webmaster wants crawled; it does not represent all assets that actually have traffic, backlinks, or search visibility. A more reliable approach is to review several sources together: historically indexed pages, organic-traffic landing pages, externally referenced pages, historical advertising landing pages, and old campaign pages that are still being accessed in the backend.
If you migrate only the content visible in the current navigation, you will usually miss a number of old pages. These pages may not be prominent, but they may have accumulated backlinks, citations from industry forums, or even long-term inquiry records. During project implementation, it is recommended to classify old URLs by value instead of handling them all in the same way:
There is a common misconception here: redirecting a large number of old pages directly to the homepage. Technically, this is a 301 redirect, but the results are poor. Search engines will determine that the target page does not match the topic of the original page, reducing the transfer of authority. Users will also be unable to find the content they expected, increasing the bounce rate.

A genuinely useful 301 mapping table should contain more than just “old URL–new URL.” At a minimum, it should include page type, topic, traffic value, backlink status, whether the title topic is retained, owner, and pre-launch status. This provides a direct benefit: whenever the content, development, and SEO teams disagree, it is easy to identify the point of contention.
To determine where an old URL should redirect, first ask what problem the page originally solved. For example, if the old page was a detailed description of a niche product, the new site should still direct it to the corresponding product detail page or the closest solution page, even if the directory structure has changed. If the old page attracted traffic for a particular market keyword, do not redirect it roughly to a general category page. The biggest risk in a project is that “the structure becomes neater while the search intent becomes unclear.”
A 301 redirect itself is not complicated. The difficulty lies in the errors that can occur during bulk implementation, many of which do not become apparent until several weeks after launch. The following types should be checked one by one before launch.
In practice, checking an individual URL is not difficult; the challenge is checking template rules. This is especially true for multilingual sites, parameter pages, filtered pages, and historical campaign pages. Once a generalized rule is applied to all of them, it is easy to end up with a situation where “everything appears to open, but everything is actually redirected incorrectly.”
Some projects implement 301 redirects correctly but still recover slowly. The problem is often not the redirects themselves, but the failure to synchronize internal signals. If the new site still contains links to old URLs, search engines will continue crawling those old addresses, increasing inefficient crawling. If canonical tags, breadcrumbs, in-content internal links, and navigation links have not been fully updated, they can also slow the migration process.
You can understand this step as telling search engines, “The new site structure is now finalized; do not continue returning to the old URLs.” At a minimum, the following items should be included in the launch checklist:
A common misjudgment in project management is to consider a redesign complete once the pages are accessible and the redirect rules have been deployed. In reality, the critical period for a 301 weiterleitungen relaunch is the two to six weeks after launch. During this period, you should monitor the replacement speed of indexed pages, crawling anomalies, growth in 404 errors, ranking fluctuations for core keywords, and whether organic visits to high-value pages have declined significantly.
More practically, it is recommended to divide monitoring into two levels. The first level covers technical status: status codes, redirect chains, crawl hits in logs, and server errors. The second level covers business results: changes in traffic to inquiry pages, product pages, and key country- or language-specific directories. This is particularly important for overseas websites because after a redesign involving multiple markets, different regional directories often recover at different speeds. You cannot assess the situation by looking only at total site traffic.
A redesign often involves content reduction. The issue is not whether pages can be deleted, but whether there are clear criteria for making that decision. If an old section has merely changed its name, it should generally be consolidated through a redirect. If the topic has disappeared completely, assess whether those pages still have indexing, backlink, or historical conversion value. Pages without value can be taken offline; valuable pages should either retain their content or be migrated to a sufficiently relevant new page.
This type of decision is similar to other integration work. On the surface, it is a structural adjustment, but in practice it tests how existing assets are preserved and connected. During project planning, some managers may use other integration methodologies to build a checklist. For example, ideas from materials such as Integration and Operational Optimization Strategies for Property Company Mergers and Acquisitions may also provide a reference for website migration: identify core assets first, then decide whether to retain, merge, or remove them instead of applying a one-size-fits-all approach.
If you manage websites targeting different markets such as North America, Europe, and Southeast Asia, the 301 strategy must work across more than just the primary-language version. A common problem is that the migration logic for the Chinese site is clear, while the English, Russian, and Japanese sites are uniformly redirected to a generic page. As a result, old rankings cannot be retained and the new pages fail to inherit the relevant value effectively.
The criteria are simple: the language, region, and type of search intent served by the old page should correspond as closely as possible to the language, topic, and level of the new page. If a business-related consolidation is necessary, confirm that the target page covers at least the core information of the original page. Otherwise, although the authority has “somewhere to go,” relevance will be weakened.
If you need to move this work forward, do not start with “What should we do on launch day?” Instead, assign tasks in the following order:
301 redirects are not an auxiliary task in a redesign; they are one of the main workstreams of the migration project. Whether old links are properly handled often determines whether the new site can stabilize existing traffic after launch or has to start rebuilding from scratch. For project managers, the most practical principle is simple: preserve existing search assets first, then pursue growth through the new structure.
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