Final answer:
A 301 redirect is used for website migration to ensure correct redirection of old URLs to new URLs.
Step-by-step explanation:
A 301 redirect is a way to permanently redirect one web page to another. Its purpose is often seen in website migration, where the URL structure of a website changes and old URLs need to be redirected to new ones. This helps maintain search engine rankings and ensures that users are directed to the correct page.
For example, if a website undergoes a redesign and the URLs change, implementing 301 redirects will automatically redirect users and search engines from the old URLs to the new ones, preserving the SEO value of the original page.
In summary, the purpose of a 301 redirect is primarily for website migration, ensuring that pages from the old website are correctly redirected to the new website.