OK, I thought this was a really bad way of redirecting pages as it is often used by spammers and so it hurts page value for SEO. Isn't that true?
"If you need to change the URL of a page as it is shown in search engine results, we recommended that you use a server-side 301 redirect. This is the best way to ensure that users and search engines are directed to the correct page. The 301 status code means that a page has permanently moved to a new location."