Redirect Modes
Instant redirect mode - short URL will forward visitors to target URL.
Cloacked redirect mode - your URL will be opened within invisible frame on this domain and visitors won't see target domain and URL unless they open source code.
Middle page mode - this site will show page with countdown for few seconds - then visitor will be automatically redirected to target URL.
Framed redirect mode (shared links in rating section of this site) - similar to cloaked mode but frame will be visible and may contain advertisement.