There are thousands of reasons why one must perform URL redirection on their websites.  The most common reasons are: 1. Having duplicate content that can negatively affect your SEO performance.  2. Updating a post’s URL. If you want to get rid of the 404 Error, you must ensure that you have to perform redirection of your deleted page to the new one.  3. Migrating from an old domain to a new one. You may use 301 redirects to permanently forward your old content to a new one. This practice carries the Google PageRank and page authority.  4. Managing two or more domains. If you manage multiple domains, it is wise to consolidate your content than maintain pages that are almost the same. This move will help you better focus on one website and track its SEO performance.