How to safely move your old website to Drupal
The most important activity in moving your old website to Drupal is preparing your redirect implementation. You must guarantee that no URL is left abandoned in the search engine index. They don't need to remain the same between the different platforms, but they must have a corresponding URL on the new website – a path to follow and redirect.
Why is this activity so crucial? Let's suppose that you had a blog post that was very popular, and because of that, it gathered hundreds of backlinks from other websites and shares on social media. All those links are giving Google a powerful ranking signal and contributing to your overall Google rankings and visibility. If that URL changes, all those links will point to a non-existent URL, and the website's visitors and search engine bots will get a 404 error (Page Not Found). If this is not fixed, your rankings could be impacted very negatively. Moreover, this is terrible...
