Correct redirect of URL

To redirect an URL go to Settings --> Redirect url

Click on New Redirect url to create a new redirect.

In Path the old url goes. I.e. the url that you want to redirect to somewhere else. 

In Redirect url the new url goes. I.e. the url that you want to get when the user tries to access the url from Path.

When redirecting internally on the site the domain is not needed i.e., you only have to put e.g. /category/titel and not domain/category/titel.
This is also the case if you redirect to an internal site.

When redirecting externally, e.i. to another site or domain, the first slash is NOT needed, but the entire url including http:// is.