with this PrestaShop module you can create unlimited number of 301, 302, 303 redirections.
It's very good for SEO purposes, because google doesnt like 404 errors at all. With this extension you can redirect pages that spawns 404 errors to new ones that works. Major advantage of this module is possibility to import list of not working urls with "import csv" feature that is included into this module. Its a great way to fix errors in bulk!
this addon contains also stats feature, where you can see how the redirections work. You can see most common redirected entries, you can see stats by week, month and year.
more informations about this module is available here, on official seo redirect module website: