When you are in the planning stages of your catalog is an ideal time to consider the URL configuration options that are available to you. By using relevant, high-value keywords, you can improve the way the page is indexed by search engines. For many merchants, modifying catalog URLs is part of an ongoing effort to improve SEO.
The URL Rewrite Management tool lets you change any URL that is associated with a product, category, or CMS page. When the redirect goes into effect, any existing links that point to the previous URL are automatically redirected to the new address.
The terms rewrite and redirect are often used interchangeably, but refer to slightly different processes. A URL rewrite changes the way a URL appears in the browser. A URL redirect, on the other hand, updates the URL that is stored on the server. A URL redirect can be either temporary or permanent. Your store uses both techniques to make it easy for you to create search engine friendly URLs and to preserve existing links.